{"asset": "hazmat-segregation-matrix", "asset_type": "compatibility-matrix", "body": "The pairwise load-segregation rules for hazardous materials: for each pair of hazard classes/divisions, whether they may be loaded, transported or stored together on a highway vehicle (49 CFR 177.848) and on a vessel (49 CFR 176.83), and what the code at the intersection requires ('X' may not be loaded together, 'O' separated so no commingling on leakage, '*' see the class-1 compatibility table, blank no restriction, plus the ammonium-nitrate note 'A'). The same pair can carry a different answer by mode \u2014 that cross-mode comparison is the page no one publishes. Answers 'can Division 4.3 ride with Class 8 corrosive liquids' (yes on highway with separation \u2014 the O cell), 'can I load oxidizers with flammable liquids', and the per-pair questions shippers and freight brokers ask before booking mixed loads. A pairwise matrix is a shape the portfolio has not tried: the record is an intersection, not a row.\n", "description": "The pairwise load-segregation rules for hazardous materials: for each pair of hazard classes/divisions, whether they may be loaded, transported or stored together on a highway vehicle (49 CFR 177.848) and on a vessel (49 CFR 176.83), and what the code at the intersection requires ('X' may not be loaded together, 'O' separated so no commingling on leakage, '*' see the class-1 compatibility table, blank no restriction, plus the ammonium-nitrate note 'A'). The same pair can carry a different answer by mode \u2014 that cross-mode comparison is the page no one publishes. Answers 'can Division 4.3 ride with Class 8 corrosive liquids' (yes on highway with separation \u2014 the O cell), 'can I load oxidizers with flammable liquids', and the per-pair questions shippers and freight brokers ask before booking mixed loads. A pairwise matrix is a shape the portfolio has not tried: the record is an intersection, not a row.", "file": "index.md", "generated": true, "harvested": "2026-08-10", "key_field": "class_a", "licence": "US federal regulation; facts not copyrightable, quoted with citation.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848", "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "dataset", "verified": false} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** cyanides, cyanide mixtures or solutions\n\n**Second hazard class (table column):** acids\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** cyanides, cyanide mixtures or solutions may not be stored, loaded and transported with acids if a mixture of the materials would generate hydrogen cyanide\n\n> ( c ) In addition to the provisions of paragraph (d) of this section and except as provided in \u00a7 173.12(e) of this subchapter , cyanides, cyanide mixtures or solutions may not be stored, loaded and transported with acids if a mixture of the materials would generate hydrogen cyanide; Division 4.2 materials may not be stored, loaded and transported with Class 8 liquids; and Division 6.1 Packing Group I, Hazard Zone A material may not be stored, loaded and transported with Class 3 material, Class 8 liquids, and Division 4.1, 4.2, 4.3, 5.1 or 5.2 materials.\n\nSource: \n", "class_a": "cyanides, cyanide mixtures or solutions", "class_b": "acids", "file": "carriage-by-public-highway-acids-cyanides-cyanide-mixtures-or-solutions.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-acids-cyanides-cyanide-mixtures-or-solutions", "mode": "Carriage by Public Highway", "requirement": "cyanides, cyanide mixtures or solutions may not be stored, loaded and transported with acids if a mixture of the materials would generate hydrogen cyanide", "source_quote": "( c ) In addition to the provisions of paragraph (d) of this section and except as provided in \u00a7 173.12(e) of this subchapter , cyanides, cyanide mixtures or solutions may not be stored, loaded and transported with acids if a mixture of the materials would generate hydrogen cyanide; Division 4.2 materials may not be stored, loaded and transported with Class 8 liquids; and Division 6.1 Packing Group I, Hazard Zone A material may not be stored, loaded and transported with Class 3 material, Class 8 liquids, and Division 4.1, 4.2, 4.3, 5.1 or 5.2 materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "cyanides, cyanide mixtures or solutions \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** Division 6.1 Packing Group I, Hazard Zone A material\n\n**Second hazard class (table column):** Class 3 material, Class 8 liquids, and Division 4.1, 4.2, 4.3, 5.1 or 5.2 materials\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** Division 6.1 Packing Group I, Hazard Zone A material may not be stored, loaded and transported with Class 3 material, Class 8 liquids, and Division 4.1, 4.2, 4.3, 5.1 or 5.2 materials.\n\n> ( c ) In addition to the provisions of paragraph (d) of this section and except as provided in \u00a7 173.12(e) of this subchapter , cyanides, cyanide mixtures or solutions may not be stored, loaded and transported with acids if a mixture of the materials would generate hydrogen cyanide; Division 4.2 materials may not be stored, loaded and transported with Class 8 liquids; and Division 6.1 Packing Group I, Hazard Zone A material may not be stored, loaded and transported with Class 3 material, Class 8 liquids, and Division 4.1, 4.2, 4.3, 5.1 or 5.2 materials.\n\nSource: \n", "class_a": "Division 6.1 Packing Group I, Hazard Zone A material", "class_b": "Class 3 material, Class 8 liquids, and Division 4.1, 4.2, 4.3, 5.1 or 5.2 materials", "file": "carriage-by-public-highway-class-3-material-class-8-liquids-and-division-4-1-4-2-4-3-5-1-or-5-2-materials-division-6-1-packing-group-i-hazard-zone-a-material.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-class-3-material-class-8-liquids-and-division-4-1-4-2-4-3-5-1-or-5-2-materials-division-6-1-packing-group-i-hazard-zone-a-material", "mode": "Carriage by Public Highway", "requirement": "Division 6.1 Packing Group I, Hazard Zone A material may not be stored, loaded and transported with Class 3 material, Class 8 liquids, and Division 4.1, 4.2, 4.3, 5.1 or 5.2 materials.", "source_quote": "( c ) In addition to the provisions of paragraph (d) of this section and except as provided in \u00a7 173.12(e) of this subchapter , cyanides, cyanide mixtures or solutions may not be stored, loaded and transported with acids if a mixture of the materials would generate hydrogen cyanide; Division 4.2 materials may not be stored, loaded and transported with Class 8 liquids; and Division 6.1 Packing Group I, Hazard Zone A material may not be stored, loaded and transported with Class 3 material, Class 8 liquids, and Division 4.1, 4.2, 4.3, 5.1 or 5.2 materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "Division 6.1 Packing Group I, Hazard Zone A material \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** Division 4.2 materials\n\n**Second hazard class (table column):** Class 8 liquids\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** Division 4.2 materials may not be stored, loaded and transported with Class 8 liquids\n\n> ( c ) In addition to the provisions of paragraph (d) of this section and except as provided in \u00a7 173.12(e) of this subchapter , cyanides, cyanide mixtures or solutions may not be stored, loaded and transported with acids if a mixture of the materials would generate hydrogen cyanide; Division 4.2 materials may not be stored, loaded and transported with Class 8 liquids; and Division 6.1 Packing Group I, Hazard Zone A material may not be stored, loaded and transported with Class 3 material, Class 8 liquids, and Division 4.1, 4.2, 4.3, 5.1 or 5.2 materials.\n\nSource: \n", "class_a": "Division 4.2 materials", "class_b": "Class 8 liquids", "file": "carriage-by-public-highway-class-8-liquids-division-4-2-materials.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-class-8-liquids-division-4-2-materials", "mode": "Carriage by Public Highway", "requirement": "Division 4.2 materials may not be stored, loaded and transported with Class 8 liquids", "source_quote": "( c ) In addition to the provisions of paragraph (d) of this section and except as provided in \u00a7 173.12(e) of this subchapter , cyanides, cyanide mixtures or solutions may not be stored, loaded and transported with acids if a mixture of the materials would generate hydrogen cyanide; Division 4.2 materials may not be stored, loaded and transported with Class 8 liquids; and Division 6.1 Packing Group I, Hazard Zone A material may not be stored, loaded and transported with Class 3 material, Class 8 liquids, and Division 4.1, 4.2, 4.3, 5.1 or 5.2 materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "Division 4.2 materials \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** A\n\n**Second hazard class (table column):** A\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** A blank space in the table indicates that no restrictions apply.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "A", "class_b": "A", "file": "carriage-by-public-highway-compatibility-group-a-a.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-a-a", "mode": "Carriage by Public Highway", "requirement": "A blank space in the table indicates that no restrictions apply.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "A \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** B\n\n**Second hazard class (table column):** A\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "B", "class_b": "A", "code": "X", "file": "carriage-by-public-highway-compatibility-group-a-b.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-a-b", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "B \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** C\n\n**Second hazard class (table column):** A\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "C", "class_b": "A", "code": "X", "file": "carriage-by-public-highway-compatibility-group-a-c.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-a-c", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "C \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** D\n\n**Second hazard class (table column):** A\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "D", "class_b": "A", "code": "X", "file": "carriage-by-public-highway-compatibility-group-a-d.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-a-d", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "D \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** E\n\n**Second hazard class (table column):** A\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "E", "class_b": "A", "code": "X", "file": "carriage-by-public-highway-compatibility-group-a-e.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-a-e", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "E \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** F\n\n**Second hazard class (table column):** A\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "F", "class_b": "A", "code": "X", "file": "carriage-by-public-highway-compatibility-group-a-f.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-a-f", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "F \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** G\n\n**Second hazard class (table column):** A\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "G", "class_b": "A", "code": "X", "file": "carriage-by-public-highway-compatibility-group-a-g.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-a-g", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "G \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** H\n\n**Second hazard class (table column):** A\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "H", "class_b": "A", "code": "X", "file": "carriage-by-public-highway-compatibility-group-a-h.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-a-h", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "H \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** J\n\n**Second hazard class (table column):** A\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "J", "class_b": "A", "code": "X", "file": "carriage-by-public-highway-compatibility-group-a-j.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-a-j", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "J \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** K\n\n**Second hazard class (table column):** A\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "K", "class_b": "A", "code": "X", "file": "carriage-by-public-highway-compatibility-group-a-k.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-a-k", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "K \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** L\n\n**Second hazard class (table column):** A\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "L", "class_b": "A", "code": "X", "file": "carriage-by-public-highway-compatibility-group-a-l.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-a-l", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "L \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** N\n\n**Second hazard class (table column):** A\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "N", "class_b": "A", "code": "X", "file": "carriage-by-public-highway-compatibility-group-a-n.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-a-n", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "N \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** S\n\n**Second hazard class (table column):** A\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "S", "class_b": "A", "code": "X", "file": "carriage-by-public-highway-compatibility-group-a-s.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-a-s", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "S \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** A\n\n**Second hazard class (table column):** B\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "A", "class_b": "B", "code": "X", "file": "carriage-by-public-highway-compatibility-group-b-a.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-b-a", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "A \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** B\n\n**Second hazard class (table column):** B\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** A blank space in the table indicates that no restrictions apply.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "B", "class_b": "B", "file": "carriage-by-public-highway-compatibility-group-b-b.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-b-b", "mode": "Carriage by Public Highway", "requirement": "A blank space in the table indicates that no restrictions apply.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "B \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** C\n\n**Second hazard class (table column):** B\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "C", "class_b": "B", "code": "X", "file": "carriage-by-public-highway-compatibility-group-b-c.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-b-c", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "C \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** D\n\n**Second hazard class (table column):** B\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X (4)\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "D", "class_b": "B", "code": "X (4)", "file": "carriage-by-public-highway-compatibility-group-b-d.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-b-d", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "D \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** E\n\n**Second hazard class (table column):** B\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "E", "class_b": "B", "code": "X", "file": "carriage-by-public-highway-compatibility-group-b-e.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-b-e", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "E \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** F\n\n**Second hazard class (table column):** B\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "F", "class_b": "B", "code": "X", "file": "carriage-by-public-highway-compatibility-group-b-f.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-b-f", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "F \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** G\n\n**Second hazard class (table column):** B\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "G", "class_b": "B", "code": "X", "file": "carriage-by-public-highway-compatibility-group-b-g.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-b-g", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "G \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** H\n\n**Second hazard class (table column):** B\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "H", "class_b": "B", "code": "X", "file": "carriage-by-public-highway-compatibility-group-b-h.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-b-h", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "H \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** J\n\n**Second hazard class (table column):** B\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "J", "class_b": "B", "code": "X", "file": "carriage-by-public-highway-compatibility-group-b-j.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-b-j", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "J \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** K\n\n**Second hazard class (table column):** B\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "K", "class_b": "B", "code": "X", "file": "carriage-by-public-highway-compatibility-group-b-k.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-b-k", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "K \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** L\n\n**Second hazard class (table column):** B\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "L", "class_b": "B", "code": "X", "file": "carriage-by-public-highway-compatibility-group-b-l.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-b-l", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "L \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** N\n\n**Second hazard class (table column):** B\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "N", "class_b": "B", "code": "X", "file": "carriage-by-public-highway-compatibility-group-b-n.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-b-n", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "N \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** S\n\n**Second hazard class (table column):** B\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** 4/5\n\n**What the code requires:** \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "S", "class_b": "B", "code": "4/5", "file": "carriage-by-public-highway-compatibility-group-b-s.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-b-s", "mode": "Carriage by Public Highway", "requirement": "\u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "S \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** A\n\n**Second hazard class (table column):** C\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "A", "class_b": "C", "code": "X", "file": "carriage-by-public-highway-compatibility-group-c-a.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-c-a", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "A \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** B\n\n**Second hazard class (table column):** C\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "B", "class_b": "C", "code": "X", "file": "carriage-by-public-highway-compatibility-group-c-b.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-c-b", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "B \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** C\n\n**Second hazard class (table column):** C\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** A blank space in the table indicates that no restrictions apply.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "C", "class_b": "C", "file": "carriage-by-public-highway-compatibility-group-c-c.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-c-c", "mode": "Carriage by Public Highway", "requirement": "A blank space in the table indicates that no restrictions apply.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "C \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** D\n\n**Second hazard class (table column):** C\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** 2\n\n**What the code requires:** \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "D", "class_b": "C", "code": "2", "file": "carriage-by-public-highway-compatibility-group-c-d.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-c-d", "mode": "Carriage by Public Highway", "requirement": "\u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "D \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** E\n\n**Second hazard class (table column):** C\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** 2\n\n**What the code requires:** \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "E", "class_b": "C", "code": "2", "file": "carriage-by-public-highway-compatibility-group-c-e.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-c-e", "mode": "Carriage by Public Highway", "requirement": "\u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "E \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** F\n\n**Second hazard class (table column):** C\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "F", "class_b": "C", "code": "X", "file": "carriage-by-public-highway-compatibility-group-c-f.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-c-f", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "F \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** G\n\n**Second hazard class (table column):** C\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** 6\n\n**What the code requires:** \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "G", "class_b": "C", "code": "6", "file": "carriage-by-public-highway-compatibility-group-c-g.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-c-g", "mode": "Carriage by Public Highway", "requirement": "\u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "G \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** H\n\n**Second hazard class (table column):** C\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "H", "class_b": "C", "code": "X", "file": "carriage-by-public-highway-compatibility-group-c-h.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-c-h", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "H \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** J\n\n**Second hazard class (table column):** C\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "J", "class_b": "C", "code": "X", "file": "carriage-by-public-highway-compatibility-group-c-j.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-c-j", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "J \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** K\n\n**Second hazard class (table column):** C\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "K", "class_b": "C", "code": "X", "file": "carriage-by-public-highway-compatibility-group-c-k.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-c-k", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "K \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** L\n\n**Second hazard class (table column):** C\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "L", "class_b": "C", "code": "X", "file": "carriage-by-public-highway-compatibility-group-c-l.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-c-l", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "L \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** N\n\n**Second hazard class (table column):** C\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** 3\n\n**What the code requires:** \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "N", "class_b": "C", "code": "3", "file": "carriage-by-public-highway-compatibility-group-c-n.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-c-n", "mode": "Carriage by Public Highway", "requirement": "\u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "N \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** S\n\n**Second hazard class (table column):** C\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** 4/5\n\n**What the code requires:** \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "S", "class_b": "C", "code": "4/5", "file": "carriage-by-public-highway-compatibility-group-c-s.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-c-s", "mode": "Carriage by Public Highway", "requirement": "\u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "S \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** A\n\n**Second hazard class (table column):** D\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "A", "class_b": "D", "code": "X", "file": "carriage-by-public-highway-compatibility-group-d-a.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-d-a", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "A \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** B\n\n**Second hazard class (table column):** D\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X (4)\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "B", "class_b": "D", "code": "X (4)", "file": "carriage-by-public-highway-compatibility-group-d-b.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-d-b", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "B \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** C\n\n**Second hazard class (table column):** D\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** 2\n\n**What the code requires:** \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "C", "class_b": "D", "code": "2", "file": "carriage-by-public-highway-compatibility-group-d-c.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-d-c", "mode": "Carriage by Public Highway", "requirement": "\u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "C \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** D\n\n**Second hazard class (table column):** D\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** A blank space in the table indicates that no restrictions apply.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "D", "class_b": "D", "file": "carriage-by-public-highway-compatibility-group-d-d.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-d-d", "mode": "Carriage by Public Highway", "requirement": "A blank space in the table indicates that no restrictions apply.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "D \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** E\n\n**Second hazard class (table column):** D\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** 2\n\n**What the code requires:** \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "E", "class_b": "D", "code": "2", "file": "carriage-by-public-highway-compatibility-group-d-e.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-d-e", "mode": "Carriage by Public Highway", "requirement": "\u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "E \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** F\n\n**Second hazard class (table column):** D\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "F", "class_b": "D", "code": "X", "file": "carriage-by-public-highway-compatibility-group-d-f.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-d-f", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "F \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** G\n\n**Second hazard class (table column):** D\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** 6\n\n**What the code requires:** \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "G", "class_b": "D", "code": "6", "file": "carriage-by-public-highway-compatibility-group-d-g.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-d-g", "mode": "Carriage by Public Highway", "requirement": "\u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "G \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** H\n\n**Second hazard class (table column):** D\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "H", "class_b": "D", "code": "X", "file": "carriage-by-public-highway-compatibility-group-d-h.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-d-h", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "H \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** J\n\n**Second hazard class (table column):** D\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "J", "class_b": "D", "code": "X", "file": "carriage-by-public-highway-compatibility-group-d-j.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-d-j", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "J \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** K\n\n**Second hazard class (table column):** D\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "K", "class_b": "D", "code": "X", "file": "carriage-by-public-highway-compatibility-group-d-k.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-d-k", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "K \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** L\n\n**Second hazard class (table column):** D\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "L", "class_b": "D", "code": "X", "file": "carriage-by-public-highway-compatibility-group-d-l.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-d-l", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "L \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** N\n\n**Second hazard class (table column):** D\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** 3\n\n**What the code requires:** \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "N", "class_b": "D", "code": "3", "file": "carriage-by-public-highway-compatibility-group-d-n.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-d-n", "mode": "Carriage by Public Highway", "requirement": "\u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "N \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** S\n\n**Second hazard class (table column):** D\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** 4/5\n\n**What the code requires:** \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "S", "class_b": "D", "code": "4/5", "file": "carriage-by-public-highway-compatibility-group-d-s.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-d-s", "mode": "Carriage by Public Highway", "requirement": "\u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "S \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** A\n\n**Second hazard class (table column):** E\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "A", "class_b": "E", "code": "X", "file": "carriage-by-public-highway-compatibility-group-e-a.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-e-a", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "A \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** B\n\n**Second hazard class (table column):** E\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "B", "class_b": "E", "code": "X", "file": "carriage-by-public-highway-compatibility-group-e-b.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-e-b", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "B \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** C\n\n**Second hazard class (table column):** E\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** 2\n\n**What the code requires:** \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "C", "class_b": "E", "code": "2", "file": "carriage-by-public-highway-compatibility-group-e-c.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-e-c", "mode": "Carriage by Public Highway", "requirement": "\u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "C \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** D\n\n**Second hazard class (table column):** E\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** 2\n\n**What the code requires:** \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "D", "class_b": "E", "code": "2", "file": "carriage-by-public-highway-compatibility-group-e-d.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-e-d", "mode": "Carriage by Public Highway", "requirement": "\u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "D \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** E\n\n**Second hazard class (table column):** E\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** A blank space in the table indicates that no restrictions apply.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "E", "class_b": "E", "file": "carriage-by-public-highway-compatibility-group-e-e.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-e-e", "mode": "Carriage by Public Highway", "requirement": "A blank space in the table indicates that no restrictions apply.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "E \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** F\n\n**Second hazard class (table column):** E\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "F", "class_b": "E", "code": "X", "file": "carriage-by-public-highway-compatibility-group-e-f.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-e-f", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "F \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** G\n\n**Second hazard class (table column):** E\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** 6\n\n**What the code requires:** \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "G", "class_b": "E", "code": "6", "file": "carriage-by-public-highway-compatibility-group-e-g.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-e-g", "mode": "Carriage by Public Highway", "requirement": "\u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "G \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** H\n\n**Second hazard class (table column):** E\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "H", "class_b": "E", "code": "X", "file": "carriage-by-public-highway-compatibility-group-e-h.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-e-h", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "H \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** J\n\n**Second hazard class (table column):** E\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "J", "class_b": "E", "code": "X", "file": "carriage-by-public-highway-compatibility-group-e-j.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-e-j", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "J \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** K\n\n**Second hazard class (table column):** E\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "K", "class_b": "E", "code": "X", "file": "carriage-by-public-highway-compatibility-group-e-k.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-e-k", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "K \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** L\n\n**Second hazard class (table column):** E\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "L", "class_b": "E", "code": "X", "file": "carriage-by-public-highway-compatibility-group-e-l.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-e-l", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "L \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** N\n\n**Second hazard class (table column):** E\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** 3\n\n**What the code requires:** \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "N", "class_b": "E", "code": "3", "file": "carriage-by-public-highway-compatibility-group-e-n.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-e-n", "mode": "Carriage by Public Highway", "requirement": "\u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "N \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** S\n\n**Second hazard class (table column):** E\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** 4/5\n\n**What the code requires:** \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "S", "class_b": "E", "code": "4/5", "file": "carriage-by-public-highway-compatibility-group-e-s.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-e-s", "mode": "Carriage by Public Highway", "requirement": "\u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "S \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** A\n\n**Second hazard class (table column):** F\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "A", "class_b": "F", "code": "X", "file": "carriage-by-public-highway-compatibility-group-f-a.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-f-a", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "A \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** B\n\n**Second hazard class (table column):** F\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "B", "class_b": "F", "code": "X", "file": "carriage-by-public-highway-compatibility-group-f-b.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-f-b", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "B \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** C\n\n**Second hazard class (table column):** F\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "C", "class_b": "F", "code": "X", "file": "carriage-by-public-highway-compatibility-group-f-c.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-f-c", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "C \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** D\n\n**Second hazard class (table column):** F\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "D", "class_b": "F", "code": "X", "file": "carriage-by-public-highway-compatibility-group-f-d.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-f-d", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "D \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** E\n\n**Second hazard class (table column):** F\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "E", "class_b": "F", "code": "X", "file": "carriage-by-public-highway-compatibility-group-f-e.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-f-e", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "E \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** F\n\n**Second hazard class (table column):** F\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** A blank space in the table indicates that no restrictions apply.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "F", "class_b": "F", "file": "carriage-by-public-highway-compatibility-group-f-f.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-f-f", "mode": "Carriage by Public Highway", "requirement": "A blank space in the table indicates that no restrictions apply.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "F \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** G\n\n**Second hazard class (table column):** F\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "G", "class_b": "F", "code": "X", "file": "carriage-by-public-highway-compatibility-group-f-g.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-f-g", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "G \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** H\n\n**Second hazard class (table column):** F\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "H", "class_b": "F", "code": "X", "file": "carriage-by-public-highway-compatibility-group-f-h.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-f-h", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "H \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** J\n\n**Second hazard class (table column):** F\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "J", "class_b": "F", "code": "X", "file": "carriage-by-public-highway-compatibility-group-f-j.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-f-j", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "J \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** K\n\n**Second hazard class (table column):** F\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "K", "class_b": "F", "code": "X", "file": "carriage-by-public-highway-compatibility-group-f-k.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-f-k", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "K \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** L\n\n**Second hazard class (table column):** F\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "L", "class_b": "F", "code": "X", "file": "carriage-by-public-highway-compatibility-group-f-l.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-f-l", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "L \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** N\n\n**Second hazard class (table column):** F\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "N", "class_b": "F", "code": "X", "file": "carriage-by-public-highway-compatibility-group-f-n.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-f-n", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "N \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** S\n\n**Second hazard class (table column):** F\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** 4/5\n\n**What the code requires:** \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "S", "class_b": "F", "code": "4/5", "file": "carriage-by-public-highway-compatibility-group-f-s.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-f-s", "mode": "Carriage by Public Highway", "requirement": "\u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "S \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** A\n\n**Second hazard class (table column):** G\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "A", "class_b": "G", "code": "X", "file": "carriage-by-public-highway-compatibility-group-g-a.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-g-a", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "A \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** B\n\n**Second hazard class (table column):** G\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "B", "class_b": "G", "code": "X", "file": "carriage-by-public-highway-compatibility-group-g-b.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-g-b", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "B \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** C\n\n**Second hazard class (table column):** G\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** 6\n\n**What the code requires:** \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "C", "class_b": "G", "code": "6", "file": "carriage-by-public-highway-compatibility-group-g-c.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-g-c", "mode": "Carriage by Public Highway", "requirement": "\u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "C \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** D\n\n**Second hazard class (table column):** G\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** 6\n\n**What the code requires:** \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "D", "class_b": "G", "code": "6", "file": "carriage-by-public-highway-compatibility-group-g-d.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-g-d", "mode": "Carriage by Public Highway", "requirement": "\u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "D \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** E\n\n**Second hazard class (table column):** G\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** 6\n\n**What the code requires:** \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "E", "class_b": "G", "code": "6", "file": "carriage-by-public-highway-compatibility-group-g-e.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-g-e", "mode": "Carriage by Public Highway", "requirement": "\u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "E \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** F\n\n**Second hazard class (table column):** G\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "F", "class_b": "G", "code": "X", "file": "carriage-by-public-highway-compatibility-group-g-f.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-g-f", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "F \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** G\n\n**Second hazard class (table column):** G\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** A blank space in the table indicates that no restrictions apply.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "G", "class_b": "G", "file": "carriage-by-public-highway-compatibility-group-g-g.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-g-g", "mode": "Carriage by Public Highway", "requirement": "A blank space in the table indicates that no restrictions apply.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "G \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** H\n\n**Second hazard class (table column):** G\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "H", "class_b": "G", "code": "X", "file": "carriage-by-public-highway-compatibility-group-g-h.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-g-h", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "H \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** J\n\n**Second hazard class (table column):** G\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "J", "class_b": "G", "code": "X", "file": "carriage-by-public-highway-compatibility-group-g-j.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-g-j", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "J \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** K\n\n**Second hazard class (table column):** G\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "K", "class_b": "G", "code": "X", "file": "carriage-by-public-highway-compatibility-group-g-k.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-g-k", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "K \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** L\n\n**Second hazard class (table column):** G\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "L", "class_b": "G", "code": "X", "file": "carriage-by-public-highway-compatibility-group-g-l.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-g-l", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "L \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** N\n\n**Second hazard class (table column):** G\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "N", "class_b": "G", "code": "X", "file": "carriage-by-public-highway-compatibility-group-g-n.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-g-n", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "N \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** S\n\n**Second hazard class (table column):** G\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** 4/5\n\n**What the code requires:** \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "S", "class_b": "G", "code": "4/5", "file": "carriage-by-public-highway-compatibility-group-g-s.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-g-s", "mode": "Carriage by Public Highway", "requirement": "\u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "S \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** A\n\n**Second hazard class (table column):** H\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "A", "class_b": "H", "code": "X", "file": "carriage-by-public-highway-compatibility-group-h-a.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-h-a", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "A \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** B\n\n**Second hazard class (table column):** H\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "B", "class_b": "H", "code": "X", "file": "carriage-by-public-highway-compatibility-group-h-b.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-h-b", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "B \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** C\n\n**Second hazard class (table column):** H\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "C", "class_b": "H", "code": "X", "file": "carriage-by-public-highway-compatibility-group-h-c.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-h-c", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "C \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** D\n\n**Second hazard class (table column):** H\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "D", "class_b": "H", "code": "X", "file": "carriage-by-public-highway-compatibility-group-h-d.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-h-d", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "D \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** E\n\n**Second hazard class (table column):** H\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "E", "class_b": "H", "code": "X", "file": "carriage-by-public-highway-compatibility-group-h-e.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-h-e", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "E \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** F\n\n**Second hazard class (table column):** H\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "F", "class_b": "H", "code": "X", "file": "carriage-by-public-highway-compatibility-group-h-f.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-h-f", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "F \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** G\n\n**Second hazard class (table column):** H\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "G", "class_b": "H", "code": "X", "file": "carriage-by-public-highway-compatibility-group-h-g.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-h-g", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "G \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** H\n\n**Second hazard class (table column):** H\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** A blank space in the table indicates that no restrictions apply.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "H", "class_b": "H", "file": "carriage-by-public-highway-compatibility-group-h-h.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-h-h", "mode": "Carriage by Public Highway", "requirement": "A blank space in the table indicates that no restrictions apply.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "H \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** J\n\n**Second hazard class (table column):** H\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "J", "class_b": "H", "code": "X", "file": "carriage-by-public-highway-compatibility-group-h-j.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-h-j", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "J \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** K\n\n**Second hazard class (table column):** H\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "K", "class_b": "H", "code": "X", "file": "carriage-by-public-highway-compatibility-group-h-k.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-h-k", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "K \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** L\n\n**Second hazard class (table column):** H\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "L", "class_b": "H", "code": "X", "file": "carriage-by-public-highway-compatibility-group-h-l.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-h-l", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "L \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** N\n\n**Second hazard class (table column):** H\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "N", "class_b": "H", "code": "X", "file": "carriage-by-public-highway-compatibility-group-h-n.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-h-n", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "N \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** S\n\n**Second hazard class (table column):** H\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** 4/5\n\n**What the code requires:** \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "S", "class_b": "H", "code": "4/5", "file": "carriage-by-public-highway-compatibility-group-h-s.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-h-s", "mode": "Carriage by Public Highway", "requirement": "\u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "S \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** A\n\n**Second hazard class (table column):** J\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "A", "class_b": "J", "code": "X", "file": "carriage-by-public-highway-compatibility-group-j-a.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-j-a", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "A \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** B\n\n**Second hazard class (table column):** J\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "B", "class_b": "J", "code": "X", "file": "carriage-by-public-highway-compatibility-group-j-b.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-j-b", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "B \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** C\n\n**Second hazard class (table column):** J\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "C", "class_b": "J", "code": "X", "file": "carriage-by-public-highway-compatibility-group-j-c.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-j-c", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "C \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** D\n\n**Second hazard class (table column):** J\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "D", "class_b": "J", "code": "X", "file": "carriage-by-public-highway-compatibility-group-j-d.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-j-d", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "D \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** E\n\n**Second hazard class (table column):** J\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "E", "class_b": "J", "code": "X", "file": "carriage-by-public-highway-compatibility-group-j-e.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-j-e", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "E \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** F\n\n**Second hazard class (table column):** J\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "F", "class_b": "J", "code": "X", "file": "carriage-by-public-highway-compatibility-group-j-f.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-j-f", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "F \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** G\n\n**Second hazard class (table column):** J\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "G", "class_b": "J", "code": "X", "file": "carriage-by-public-highway-compatibility-group-j-g.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-j-g", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "G \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** H\n\n**Second hazard class (table column):** J\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "H", "class_b": "J", "code": "X", "file": "carriage-by-public-highway-compatibility-group-j-h.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-j-h", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "H \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** J\n\n**Second hazard class (table column):** J\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** A blank space in the table indicates that no restrictions apply.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "J", "class_b": "J", "file": "carriage-by-public-highway-compatibility-group-j-j.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-j-j", "mode": "Carriage by Public Highway", "requirement": "A blank space in the table indicates that no restrictions apply.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "J \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** K\n\n**Second hazard class (table column):** J\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "K", "class_b": "J", "code": "X", "file": "carriage-by-public-highway-compatibility-group-j-k.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-j-k", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "K \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** L\n\n**Second hazard class (table column):** J\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "L", "class_b": "J", "code": "X", "file": "carriage-by-public-highway-compatibility-group-j-l.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-j-l", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "L \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** N\n\n**Second hazard class (table column):** J\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "N", "class_b": "J", "code": "X", "file": "carriage-by-public-highway-compatibility-group-j-n.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-j-n", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "N \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** S\n\n**Second hazard class (table column):** J\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** 4/5\n\n**What the code requires:** \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "S", "class_b": "J", "code": "4/5", "file": "carriage-by-public-highway-compatibility-group-j-s.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-j-s", "mode": "Carriage by Public Highway", "requirement": "\u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "S \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** A\n\n**Second hazard class (table column):** K\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "A", "class_b": "K", "code": "X", "file": "carriage-by-public-highway-compatibility-group-k-a.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-k-a", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "A \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** B\n\n**Second hazard class (table column):** K\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "B", "class_b": "K", "code": "X", "file": "carriage-by-public-highway-compatibility-group-k-b.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-k-b", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "B \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** C\n\n**Second hazard class (table column):** K\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "C", "class_b": "K", "code": "X", "file": "carriage-by-public-highway-compatibility-group-k-c.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-k-c", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "C \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** D\n\n**Second hazard class (table column):** K\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "D", "class_b": "K", "code": "X", "file": "carriage-by-public-highway-compatibility-group-k-d.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-k-d", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "D \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** E\n\n**Second hazard class (table column):** K\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "E", "class_b": "K", "code": "X", "file": "carriage-by-public-highway-compatibility-group-k-e.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-k-e", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "E \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** F\n\n**Second hazard class (table column):** K\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "F", "class_b": "K", "code": "X", "file": "carriage-by-public-highway-compatibility-group-k-f.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-k-f", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "F \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** G\n\n**Second hazard class (table column):** K\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "G", "class_b": "K", "code": "X", "file": "carriage-by-public-highway-compatibility-group-k-g.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-k-g", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "G \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** H\n\n**Second hazard class (table column):** K\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "H", "class_b": "K", "code": "X", "file": "carriage-by-public-highway-compatibility-group-k-h.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-k-h", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "H \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** J\n\n**Second hazard class (table column):** K\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "J", "class_b": "K", "code": "X", "file": "carriage-by-public-highway-compatibility-group-k-j.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-k-j", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "J \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** K\n\n**Second hazard class (table column):** K\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** A blank space in the table indicates that no restrictions apply.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "K", "class_b": "K", "file": "carriage-by-public-highway-compatibility-group-k-k.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-k-k", "mode": "Carriage by Public Highway", "requirement": "A blank space in the table indicates that no restrictions apply.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "K \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** L\n\n**Second hazard class (table column):** K\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "L", "class_b": "K", "code": "X", "file": "carriage-by-public-highway-compatibility-group-k-l.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-k-l", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "L \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** N\n\n**Second hazard class (table column):** K\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "N", "class_b": "K", "code": "X", "file": "carriage-by-public-highway-compatibility-group-k-n.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-k-n", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "N \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** S\n\n**Second hazard class (table column):** K\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** 4/5\n\n**What the code requires:** \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "S", "class_b": "K", "code": "4/5", "file": "carriage-by-public-highway-compatibility-group-k-s.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-k-s", "mode": "Carriage by Public Highway", "requirement": "\u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "S \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** A\n\n**Second hazard class (table column):** L\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "A", "class_b": "L", "code": "X", "file": "carriage-by-public-highway-compatibility-group-l-a.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-l-a", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "A \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** B\n\n**Second hazard class (table column):** L\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "B", "class_b": "L", "code": "X", "file": "carriage-by-public-highway-compatibility-group-l-b.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-l-b", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "B \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** C\n\n**Second hazard class (table column):** L\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "C", "class_b": "L", "code": "X", "file": "carriage-by-public-highway-compatibility-group-l-c.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-l-c", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "C \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** D\n\n**Second hazard class (table column):** L\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "D", "class_b": "L", "code": "X", "file": "carriage-by-public-highway-compatibility-group-l-d.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-l-d", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "D \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** E\n\n**Second hazard class (table column):** L\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "E", "class_b": "L", "code": "X", "file": "carriage-by-public-highway-compatibility-group-l-e.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-l-e", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "E \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** F\n\n**Second hazard class (table column):** L\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "F", "class_b": "L", "code": "X", "file": "carriage-by-public-highway-compatibility-group-l-f.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-l-f", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "F \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** G\n\n**Second hazard class (table column):** L\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "G", "class_b": "L", "code": "X", "file": "carriage-by-public-highway-compatibility-group-l-g.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-l-g", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "G \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** H\n\n**Second hazard class (table column):** L\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "H", "class_b": "L", "code": "X", "file": "carriage-by-public-highway-compatibility-group-l-h.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-l-h", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "H \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** J\n\n**Second hazard class (table column):** L\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "J", "class_b": "L", "code": "X", "file": "carriage-by-public-highway-compatibility-group-l-j.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-l-j", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "J \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** K\n\n**Second hazard class (table column):** L\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "K", "class_b": "L", "code": "X", "file": "carriage-by-public-highway-compatibility-group-l-k.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-l-k", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "K \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** L\n\n**Second hazard class (table column):** L\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** 1\n\n**What the code requires:** \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "L", "class_b": "L", "code": "1", "file": "carriage-by-public-highway-compatibility-group-l-l.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-l-l", "mode": "Carriage by Public Highway", "requirement": "\u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "L \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** N\n\n**Second hazard class (table column):** L\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "N", "class_b": "L", "code": "X", "file": "carriage-by-public-highway-compatibility-group-l-n.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-l-n", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "N \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** S\n\n**Second hazard class (table column):** L\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "S", "class_b": "L", "code": "X", "file": "carriage-by-public-highway-compatibility-group-l-s.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-l-s", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "S \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** A\n\n**Second hazard class (table column):** N\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "A", "class_b": "N", "code": "X", "file": "carriage-by-public-highway-compatibility-group-n-a.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-n-a", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "A \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** B\n\n**Second hazard class (table column):** N\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "B", "class_b": "N", "code": "X", "file": "carriage-by-public-highway-compatibility-group-n-b.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-n-b", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "B \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** C\n\n**Second hazard class (table column):** N\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** 3\n\n**What the code requires:** \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "C", "class_b": "N", "code": "3", "file": "carriage-by-public-highway-compatibility-group-n-c.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-n-c", "mode": "Carriage by Public Highway", "requirement": "\u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "C \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** D\n\n**Second hazard class (table column):** N\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** 3\n\n**What the code requires:** \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "D", "class_b": "N", "code": "3", "file": "carriage-by-public-highway-compatibility-group-n-d.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-n-d", "mode": "Carriage by Public Highway", "requirement": "\u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "D \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** E\n\n**Second hazard class (table column):** N\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** 3\n\n**What the code requires:** \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "E", "class_b": "N", "code": "3", "file": "carriage-by-public-highway-compatibility-group-n-e.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-n-e", "mode": "Carriage by Public Highway", "requirement": "\u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "E \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** F\n\n**Second hazard class (table column):** N\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "F", "class_b": "N", "code": "X", "file": "carriage-by-public-highway-compatibility-group-n-f.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-n-f", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "F \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** G\n\n**Second hazard class (table column):** N\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "G", "class_b": "N", "code": "X", "file": "carriage-by-public-highway-compatibility-group-n-g.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-n-g", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "G \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** H\n\n**Second hazard class (table column):** N\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "H", "class_b": "N", "code": "X", "file": "carriage-by-public-highway-compatibility-group-n-h.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-n-h", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "H \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** J\n\n**Second hazard class (table column):** N\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "J", "class_b": "N", "code": "X", "file": "carriage-by-public-highway-compatibility-group-n-j.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-n-j", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "J \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** K\n\n**Second hazard class (table column):** N\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "K", "class_b": "N", "code": "X", "file": "carriage-by-public-highway-compatibility-group-n-k.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-n-k", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "K \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** L\n\n**Second hazard class (table column):** N\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "L", "class_b": "N", "code": "X", "file": "carriage-by-public-highway-compatibility-group-n-l.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-n-l", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "L \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** N\n\n**Second hazard class (table column):** N\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** A blank space in the table indicates that no restrictions apply.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "N", "class_b": "N", "file": "carriage-by-public-highway-compatibility-group-n-n.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-n-n", "mode": "Carriage by Public Highway", "requirement": "A blank space in the table indicates that no restrictions apply.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "N \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** S\n\n**Second hazard class (table column):** N\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** 4/5\n\n**What the code requires:** \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "S", "class_b": "N", "code": "4/5", "file": "carriage-by-public-highway-compatibility-group-n-s.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-n-s", "mode": "Carriage by Public Highway", "requirement": "\u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "S \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** A\n\n**Second hazard class (table column):** S\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "A", "class_b": "S", "code": "X", "file": "carriage-by-public-highway-compatibility-group-s-a.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-s-a", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "A \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** B\n\n**Second hazard class (table column):** S\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** 4/5\n\n**What the code requires:** \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "B", "class_b": "S", "code": "4/5", "file": "carriage-by-public-highway-compatibility-group-s-b.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-s-b", "mode": "Carriage by Public Highway", "requirement": "\u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "B \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** C\n\n**Second hazard class (table column):** S\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** 4/5\n\n**What the code requires:** \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "C", "class_b": "S", "code": "4/5", "file": "carriage-by-public-highway-compatibility-group-s-c.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-s-c", "mode": "Carriage by Public Highway", "requirement": "\u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "C \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** D\n\n**Second hazard class (table column):** S\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** 4/5\n\n**What the code requires:** \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "D", "class_b": "S", "code": "4/5", "file": "carriage-by-public-highway-compatibility-group-s-d.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-s-d", "mode": "Carriage by Public Highway", "requirement": "\u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "D \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** E\n\n**Second hazard class (table column):** S\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** 4/5\n\n**What the code requires:** \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "E", "class_b": "S", "code": "4/5", "file": "carriage-by-public-highway-compatibility-group-s-e.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-s-e", "mode": "Carriage by Public Highway", "requirement": "\u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "E \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** F\n\n**Second hazard class (table column):** S\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** 4/5\n\n**What the code requires:** \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "F", "class_b": "S", "code": "4/5", "file": "carriage-by-public-highway-compatibility-group-s-f.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-s-f", "mode": "Carriage by Public Highway", "requirement": "\u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "F \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** G\n\n**Second hazard class (table column):** S\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** 4/5\n\n**What the code requires:** \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "G", "class_b": "S", "code": "4/5", "file": "carriage-by-public-highway-compatibility-group-s-g.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-s-g", "mode": "Carriage by Public Highway", "requirement": "\u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "G \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** H\n\n**Second hazard class (table column):** S\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** 4/5\n\n**What the code requires:** \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "H", "class_b": "S", "code": "4/5", "file": "carriage-by-public-highway-compatibility-group-s-h.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-s-h", "mode": "Carriage by Public Highway", "requirement": "\u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "H \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** J\n\n**Second hazard class (table column):** S\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** 4/5\n\n**What the code requires:** \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "J", "class_b": "S", "code": "4/5", "file": "carriage-by-public-highway-compatibility-group-s-j.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-s-j", "mode": "Carriage by Public Highway", "requirement": "\u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "J \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** K\n\n**Second hazard class (table column):** S\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** 4/5\n\n**What the code requires:** \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "K", "class_b": "S", "code": "4/5", "file": "carriage-by-public-highway-compatibility-group-s-k.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-s-k", "mode": "Carriage by Public Highway", "requirement": "\u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "K \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** L\n\n**Second hazard class (table column):** S\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "L", "class_b": "S", "code": "X", "file": "carriage-by-public-highway-compatibility-group-s-l.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-s-l", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "L \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** N\n\n**Second hazard class (table column):** S\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** 4/5\n\n**What the code requires:** \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "N", "class_b": "S", "code": "4/5", "file": "carriage-by-public-highway-compatibility-group-s-n.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-s-n", "mode": "Carriage by Public Highway", "requirement": "\u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "N \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** S\n\n**Second hazard class (table column):** S\n\n**Row description:** Compatibility group\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** A blank space in the table indicates that no restrictions apply.\n\n> Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.\n\nSource: \n", "class_a": "S", "class_b": "S", "file": "carriage-by-public-highway-compatibility-group-s-s.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-compatibility-group-s-s", "mode": "Carriage by Public Highway", "requirement": "A blank space in the table indicates that no restrictions apply.", "row_name": "Compatibility group", "source_quote": "Compatibility Table For Class 1 (Explosive) Materials Compatibility group | A | B | C | D | E | F | G | H | J | K | L | N | S | A | | X | X | X | X | X | X | X | X | X | X | X | X | B | X | | X | X (4) | X | X | X | X | X | X | X | X | 4/5 | C | X | X | | 2 | 2 | X | 6 | X | X | X | X | 3 | 4/5 | D | X | X (4) | 2 | | 2 | X | 6 | X | X | X | X | 3 | 4/5 | E | X | X | 2 | 2 | | X | 6 | X | X | X | X | 3 | 4/5 | F | X | X | X | X | X | | X | X | X | X | X | X | 4/5 | G | X | X | 6 | 6 | 6 | X | | X | X | X | X | X | 4/5 | H | X | X | X | X | X | X | X | | X | X | X | X | 4/5 | J | X | X | X | X | X | X | X | X | | X | X | X | 4/5 | K | X | X | X | X | X | X | X | X | X | | X | X | 4/5 | L | X | X | X | X | X | X | X | X | X | X | 1 | X | X | N | X | X | 3 | 3 | 3 | X | X | X | X | X | X | | 4/5 | S | X | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | 4/5 | X | 4/5 | | ( g ) Instructions for using the compatibility table for Class 1 (explosive) materials are as follows: ( 1 ) A blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that explosives of different compatibility groups may not be carried on the same transport vehicle. ( 3 ) The numbers in the table mean the following: ( i ) \u201c1\u201d means an explosive from compatibility group L shall only be carried on the same transport vehicle with an identical explosive. ( ii ) \u201c2\u201d means any combination of explosives from compatibility groups C, D, or E is assigned to compatibility group E. ( iii ) \u201c3\u201d means any combination of explosives from compatibility groups C, D, or E with those in compatibility group N is assigned to compatibility group D. ( iv ) \u201c4\u201d means see \u00a7 177.835(g) when transporting detonators. ( v ) \u201c5\u201d means Division 1.4S fireworks may not be loaded on the same transport vehicle with Division 1.1 or 1.2 (explosive) materials. ( vi ) \u201c6\u201d means explosive articles in compatibility group G, other than fireworks and those requiring special handling, may be loaded, transported and stored with other explosive articles of compatibility groups C, D and E, provided that explosive substances (such as those not contained in articles) are not carried in the same transport vehicle.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "S \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 8\n\n**Second hazard class (table column):** 1.1 1.2\n\n**Row description:** Corrosive liquids\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "8", "class_b": "1.1 1.2", "code": "X", "file": "carriage-by-public-highway-corrosive-liquids-1-1-1-2-8.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-corrosive-liquids-1-1-1-2-8", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Corrosive liquids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "8 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 8\n\n**Second hazard class (table column):** 1.3\n\n**Row description:** Corrosive liquids\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "8", "class_b": "1.3", "code": "X", "file": "carriage-by-public-highway-corrosive-liquids-1-3-8.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-corrosive-liquids-1-3-8", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Corrosive liquids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "8 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 8\n\n**Second hazard class (table column):** 1.4\n\n**Row description:** Corrosive liquids\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "8", "class_b": "1.4", "code": "O", "file": "carriage-by-public-highway-corrosive-liquids-1-4-8.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-corrosive-liquids-1-4-8", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Corrosive liquids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "8 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 8\n\n**Second hazard class (table column):** 1.5\n\n**Row description:** Corrosive liquids\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "8", "class_b": "1.5", "code": "X", "file": "carriage-by-public-highway-corrosive-liquids-1-5-8.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-corrosive-liquids-1-5-8", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Corrosive liquids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "8 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 8\n\n**Second hazard class (table column):** 1.6\n\n**Row description:** Corrosive liquids\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "8", "class_b": "1.6", "file": "carriage-by-public-highway-corrosive-liquids-1-6-8.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-corrosive-liquids-1-6-8", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Corrosive liquids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "8 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 8\n\n**Second hazard class (table column):** 2.1\n\n**Row description:** Corrosive liquids\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "8", "class_b": "2.1", "file": "carriage-by-public-highway-corrosive-liquids-2-1-8.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-corrosive-liquids-2-1-8", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Corrosive liquids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "8 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 8\n\n**Second hazard class (table column):** 2.2\n\n**Row description:** Corrosive liquids\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "8", "class_b": "2.2", "file": "carriage-by-public-highway-corrosive-liquids-2-2-8.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-corrosive-liquids-2-2-8", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Corrosive liquids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "8 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 8\n\n**Second hazard class (table column):** 2.3 gas zone A\n\n**Row description:** Corrosive liquids\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "8", "class_b": "2.3 gas zone A", "code": "X", "file": "carriage-by-public-highway-corrosive-liquids-2-3-gas-zone-a-8.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-corrosive-liquids-2-3-gas-zone-a-8", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Corrosive liquids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "8 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 8\n\n**Second hazard class (table column):** 2.3 gas Zone B\n\n**Row description:** Corrosive liquids\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "8", "class_b": "2.3 gas Zone B", "code": "O", "file": "carriage-by-public-highway-corrosive-liquids-2-3-gas-zone-b-8.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-corrosive-liquids-2-3-gas-zone-b-8", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Corrosive liquids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "8 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 8\n\n**Second hazard class (table column):** 3\n\n**Row description:** Corrosive liquids\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "8", "class_b": "3", "file": "carriage-by-public-highway-corrosive-liquids-3-8.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-corrosive-liquids-3-8", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Corrosive liquids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "8 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 8\n\n**Second hazard class (table column):** 4.1\n\n**Row description:** Corrosive liquids\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "8", "class_b": "4.1", "code": "O", "file": "carriage-by-public-highway-corrosive-liquids-4-1-8.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-corrosive-liquids-4-1-8", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Corrosive liquids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "8 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 8\n\n**Second hazard class (table column):** 4.2\n\n**Row description:** Corrosive liquids\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "8", "class_b": "4.2", "code": "X", "file": "carriage-by-public-highway-corrosive-liquids-4-2-8.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-corrosive-liquids-4-2-8", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Corrosive liquids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "8 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 8\n\n**Second hazard class (table column):** 4.3\n\n**Row description:** Corrosive liquids\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "8", "class_b": "4.3", "code": "O", "file": "carriage-by-public-highway-corrosive-liquids-4-3-8.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-corrosive-liquids-4-3-8", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Corrosive liquids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "8 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 8\n\n**Second hazard class (table column):** 5.1\n\n**Row description:** Corrosive liquids\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "8", "class_b": "5.1", "code": "O", "file": "carriage-by-public-highway-corrosive-liquids-5-1-8.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-corrosive-liquids-5-1-8", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Corrosive liquids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "8 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 8\n\n**Second hazard class (table column):** 5.2\n\n**Row description:** Corrosive liquids\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "8", "class_b": "5.2", "code": "O", "file": "carriage-by-public-highway-corrosive-liquids-5-2-8.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-corrosive-liquids-5-2-8", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Corrosive liquids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "8 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 8\n\n**Second hazard class (table column):** 6.1 liquids PG I zone A\n\n**Row description:** Corrosive liquids\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "8", "class_b": "6.1 liquids PG I zone A", "code": "X", "file": "carriage-by-public-highway-corrosive-liquids-6-1-liquids-pg-i-zone-a-8.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-corrosive-liquids-6-1-liquids-pg-i-zone-a-8", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Corrosive liquids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "8 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 8\n\n**Second hazard class (table column):** 7\n\n**Row description:** Corrosive liquids\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "8", "class_b": "7", "file": "carriage-by-public-highway-corrosive-liquids-7-8.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-corrosive-liquids-7-8", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Corrosive liquids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "8 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 8\n\n**Second hazard class (table column):** 8 liquids only\n\n**Row description:** Corrosive liquids\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "8", "class_b": "8 liquids only", "file": "carriage-by-public-highway-corrosive-liquids-8-liquids-only-8.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-corrosive-liquids-8-liquids-only-8", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Corrosive liquids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "8 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.3\n\n**Second hazard class (table column):** 1.1 1.2\n\n**Row description:** Dangerous when wet materials\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.3", "class_b": "1.1 1.2", "code": "X", "file": "carriage-by-public-highway-dangerous-when-wet-materials-1-1-1-2-4-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-dangerous-when-wet-materials-1-1-1-2-4-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Dangerous when wet materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.3\n\n**Second hazard class (table column):** 1.3\n\n**Row description:** Dangerous when wet materials\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.3", "class_b": "1.3", "code": "X", "file": "carriage-by-public-highway-dangerous-when-wet-materials-1-3-4-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-dangerous-when-wet-materials-1-3-4-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Dangerous when wet materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.3\n\n**Second hazard class (table column):** 1.4\n\n**Row description:** Dangerous when wet materials\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.3", "class_b": "1.4", "file": "carriage-by-public-highway-dangerous-when-wet-materials-1-4-4-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-dangerous-when-wet-materials-1-4-4-3", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Dangerous when wet materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.3\n\n**Second hazard class (table column):** 1.5\n\n**Row description:** Dangerous when wet materials\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.3", "class_b": "1.5", "code": "X", "file": "carriage-by-public-highway-dangerous-when-wet-materials-1-5-4-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-dangerous-when-wet-materials-1-5-4-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Dangerous when wet materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.3\n\n**Second hazard class (table column):** 1.6\n\n**Row description:** Dangerous when wet materials\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.3", "class_b": "1.6", "file": "carriage-by-public-highway-dangerous-when-wet-materials-1-6-4-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-dangerous-when-wet-materials-1-6-4-3", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Dangerous when wet materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.3\n\n**Second hazard class (table column):** 2.1\n\n**Row description:** Dangerous when wet materials\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.3", "class_b": "2.1", "file": "carriage-by-public-highway-dangerous-when-wet-materials-2-1-4-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-dangerous-when-wet-materials-2-1-4-3", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Dangerous when wet materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.3\n\n**Second hazard class (table column):** 2.2\n\n**Row description:** Dangerous when wet materials\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.3", "class_b": "2.2", "file": "carriage-by-public-highway-dangerous-when-wet-materials-2-2-4-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-dangerous-when-wet-materials-2-2-4-3", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Dangerous when wet materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.3\n\n**Second hazard class (table column):** 2.3 gas zone A\n\n**Row description:** Dangerous when wet materials\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.3", "class_b": "2.3 gas zone A", "code": "X", "file": "carriage-by-public-highway-dangerous-when-wet-materials-2-3-gas-zone-a-4-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-dangerous-when-wet-materials-2-3-gas-zone-a-4-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Dangerous when wet materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.3\n\n**Second hazard class (table column):** 2.3 gas Zone B\n\n**Row description:** Dangerous when wet materials\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.3", "class_b": "2.3 gas Zone B", "code": "O", "file": "carriage-by-public-highway-dangerous-when-wet-materials-2-3-gas-zone-b-4-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-dangerous-when-wet-materials-2-3-gas-zone-b-4-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Dangerous when wet materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.3\n\n**Second hazard class (table column):** 3\n\n**Row description:** Dangerous when wet materials\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.3", "class_b": "3", "file": "carriage-by-public-highway-dangerous-when-wet-materials-3-4-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-dangerous-when-wet-materials-3-4-3", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Dangerous when wet materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.3\n\n**Second hazard class (table column):** 4.1\n\n**Row description:** Dangerous when wet materials\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.3", "class_b": "4.1", "file": "carriage-by-public-highway-dangerous-when-wet-materials-4-1-4-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-dangerous-when-wet-materials-4-1-4-3", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Dangerous when wet materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.3\n\n**Second hazard class (table column):** 4.2\n\n**Row description:** Dangerous when wet materials\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.3", "class_b": "4.2", "file": "carriage-by-public-highway-dangerous-when-wet-materials-4-2-4-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-dangerous-when-wet-materials-4-2-4-3", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Dangerous when wet materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.3\n\n**Second hazard class (table column):** 4.3\n\n**Row description:** Dangerous when wet materials\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.3", "class_b": "4.3", "file": "carriage-by-public-highway-dangerous-when-wet-materials-4-3-4-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-dangerous-when-wet-materials-4-3-4-3", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Dangerous when wet materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.3\n\n**Second hazard class (table column):** 5.1\n\n**Row description:** Dangerous when wet materials\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.3", "class_b": "5.1", "file": "carriage-by-public-highway-dangerous-when-wet-materials-5-1-4-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-dangerous-when-wet-materials-5-1-4-3", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Dangerous when wet materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.3\n\n**Second hazard class (table column):** 5.2\n\n**Row description:** Dangerous when wet materials\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.3", "class_b": "5.2", "file": "carriage-by-public-highway-dangerous-when-wet-materials-5-2-4-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-dangerous-when-wet-materials-5-2-4-3", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Dangerous when wet materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.3\n\n**Second hazard class (table column):** 6.1 liquids PG I zone A\n\n**Row description:** Dangerous when wet materials\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.3", "class_b": "6.1 liquids PG I zone A", "code": "X", "file": "carriage-by-public-highway-dangerous-when-wet-materials-6-1-liquids-pg-i-zone-a-4-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-dangerous-when-wet-materials-6-1-liquids-pg-i-zone-a-4-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Dangerous when wet materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.3\n\n**Second hazard class (table column):** 7\n\n**Row description:** Dangerous when wet materials\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.3", "class_b": "7", "file": "carriage-by-public-highway-dangerous-when-wet-materials-7-4-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-dangerous-when-wet-materials-7-4-3", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Dangerous when wet materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.3\n\n**Second hazard class (table column):** 8 liquids only\n\n**Row description:** Dangerous when wet materials\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.3", "class_b": "8 liquids only", "code": "O", "file": "carriage-by-public-highway-dangerous-when-wet-materials-8-liquids-only-4-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-dangerous-when-wet-materials-8-liquids-only-4-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Dangerous when wet materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.1 and 1.2\n\n**Second hazard class (table column):** 1.1 1.2\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** *\n\n**What the code requires:** The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.1 and 1.2", "class_b": "1.1 1.2", "code": "*", "file": "carriage-by-public-highway-explosives-1-1-1-2-1-1-and-1-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-1-1-1-2-1-1-and-1-2", "mode": "Carriage by Public Highway", "requirement": "The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.1 and 1.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.3\n\n**Second hazard class (table column):** 1.1 1.2\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** *\n\n**What the code requires:** The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.3", "class_b": "1.1 1.2", "code": "*", "file": "carriage-by-public-highway-explosives-1-1-1-2-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-1-1-1-2-1-3", "mode": "Carriage by Public Highway", "requirement": "The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.4\n\n**Second hazard class (table column):** 1.1 1.2\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** *\n\n**What the code requires:** The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.4", "class_b": "1.1 1.2", "code": "*", "file": "carriage-by-public-highway-explosives-1-1-1-2-1-4.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-1-1-1-2-1-4", "mode": "Carriage by Public Highway", "requirement": "The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.4 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.1 and 1.2\n\n**Second hazard class (table column):** 1.3\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** *\n\n**What the code requires:** The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.1 and 1.2", "class_b": "1.3", "code": "*", "file": "carriage-by-public-highway-explosives-1-3-1-1-and-1-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-1-3-1-1-and-1-2", "mode": "Carriage by Public Highway", "requirement": "The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.1 and 1.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.3\n\n**Second hazard class (table column):** 1.3\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** *\n\n**What the code requires:** The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.3", "class_b": "1.3", "code": "*", "file": "carriage-by-public-highway-explosives-1-3-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-1-3-1-3", "mode": "Carriage by Public Highway", "requirement": "The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.4\n\n**Second hazard class (table column):** 1.3\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** *\n\n**What the code requires:** The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.4", "class_b": "1.3", "code": "*", "file": "carriage-by-public-highway-explosives-1-3-1-4.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-1-3-1-4", "mode": "Carriage by Public Highway", "requirement": "The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.4 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.1 and 1.2\n\n**Second hazard class (table column):** 1.4\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** *\n\n**What the code requires:** The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.1 and 1.2", "class_b": "1.4", "code": "*", "file": "carriage-by-public-highway-explosives-1-4-1-1-and-1-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-1-4-1-1-and-1-2", "mode": "Carriage by Public Highway", "requirement": "The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.1 and 1.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.3\n\n**Second hazard class (table column):** 1.4\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** *\n\n**What the code requires:** The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.3", "class_b": "1.4", "code": "*", "file": "carriage-by-public-highway-explosives-1-4-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-1-4-1-3", "mode": "Carriage by Public Highway", "requirement": "The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.4\n\n**Second hazard class (table column):** 1.4\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** *\n\n**What the code requires:** The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.4", "class_b": "1.4", "code": "*", "file": "carriage-by-public-highway-explosives-1-4-1-4.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-1-4-1-4", "mode": "Carriage by Public Highway", "requirement": "The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.4 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.1 and 1.2\n\n**Second hazard class (table column):** 1.5\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** *\n\n**What the code requires:** The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.1 and 1.2", "class_b": "1.5", "code": "*", "file": "carriage-by-public-highway-explosives-1-5-1-1-and-1-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-1-5-1-1-and-1-2", "mode": "Carriage by Public Highway", "requirement": "The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.1 and 1.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.3\n\n**Second hazard class (table column):** 1.5\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** *\n\n**What the code requires:** The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.3", "class_b": "1.5", "code": "*", "file": "carriage-by-public-highway-explosives-1-5-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-1-5-1-3", "mode": "Carriage by Public Highway", "requirement": "The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.4\n\n**Second hazard class (table column):** 1.5\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** *\n\n**What the code requires:** The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.4", "class_b": "1.5", "code": "*", "file": "carriage-by-public-highway-explosives-1-5-1-4.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-1-5-1-4", "mode": "Carriage by Public Highway", "requirement": "The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.4 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.1 and 1.2\n\n**Second hazard class (table column):** 1.6\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** *\n\n**What the code requires:** The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.1 and 1.2", "class_b": "1.6", "code": "*", "file": "carriage-by-public-highway-explosives-1-6-1-1-and-1-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-1-6-1-1-and-1-2", "mode": "Carriage by Public Highway", "requirement": "The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.1 and 1.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.3\n\n**Second hazard class (table column):** 1.6\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** *\n\n**What the code requires:** The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.3", "class_b": "1.6", "code": "*", "file": "carriage-by-public-highway-explosives-1-6-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-1-6-1-3", "mode": "Carriage by Public Highway", "requirement": "The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.4\n\n**Second hazard class (table column):** 1.6\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** *\n\n**What the code requires:** The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.4", "class_b": "1.6", "code": "*", "file": "carriage-by-public-highway-explosives-1-6-1-4.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-1-6-1-4", "mode": "Carriage by Public Highway", "requirement": "The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.4 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.1 and 1.2\n\n**Second hazard class (table column):** 2.1\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.1 and 1.2", "class_b": "2.1", "code": "X", "file": "carriage-by-public-highway-explosives-2-1-1-1-and-1-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-2-1-1-1-and-1-2", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.1 and 1.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.3\n\n**Second hazard class (table column):** 2.1\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.3", "class_b": "2.1", "code": "X", "file": "carriage-by-public-highway-explosives-2-1-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-2-1-1-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.4\n\n**Second hazard class (table column):** 2.1\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.4", "class_b": "2.1", "code": "O", "file": "carriage-by-public-highway-explosives-2-1-1-4.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-2-1-1-4", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.4 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.1 and 1.2\n\n**Second hazard class (table column):** 2.2\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.1 and 1.2", "class_b": "2.2", "code": "X", "file": "carriage-by-public-highway-explosives-2-2-1-1-and-1-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-2-2-1-1-and-1-2", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.1 and 1.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.3\n\n**Second hazard class (table column):** 2.2\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.3", "class_b": "2.2", "file": "carriage-by-public-highway-explosives-2-2-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-2-2-1-3", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.4\n\n**Second hazard class (table column):** 2.2\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.4", "class_b": "2.2", "file": "carriage-by-public-highway-explosives-2-2-1-4.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-2-2-1-4", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.4 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.1 and 1.2\n\n**Second hazard class (table column):** 2.3 gas zone A\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.1 and 1.2", "class_b": "2.3 gas zone A", "code": "X", "file": "carriage-by-public-highway-explosives-2-3-gas-zone-a-1-1-and-1-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-2-3-gas-zone-a-1-1-and-1-2", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.1 and 1.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.3\n\n**Second hazard class (table column):** 2.3 gas zone A\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.3", "class_b": "2.3 gas zone A", "code": "X", "file": "carriage-by-public-highway-explosives-2-3-gas-zone-a-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-2-3-gas-zone-a-1-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.4\n\n**Second hazard class (table column):** 2.3 gas zone A\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.4", "class_b": "2.3 gas zone A", "code": "O", "file": "carriage-by-public-highway-explosives-2-3-gas-zone-a-1-4.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-2-3-gas-zone-a-1-4", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.4 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.1 and 1.2\n\n**Second hazard class (table column):** 2.3 gas Zone B\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.1 and 1.2", "class_b": "2.3 gas Zone B", "code": "X", "file": "carriage-by-public-highway-explosives-2-3-gas-zone-b-1-1-and-1-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-2-3-gas-zone-b-1-1-and-1-2", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.1 and 1.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.3\n\n**Second hazard class (table column):** 2.3 gas Zone B\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.3", "class_b": "2.3 gas Zone B", "code": "X", "file": "carriage-by-public-highway-explosives-2-3-gas-zone-b-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-2-3-gas-zone-b-1-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.4\n\n**Second hazard class (table column):** 2.3 gas Zone B\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.4", "class_b": "2.3 gas Zone B", "code": "O", "file": "carriage-by-public-highway-explosives-2-3-gas-zone-b-1-4.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-2-3-gas-zone-b-1-4", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.4 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.1 and 1.2\n\n**Second hazard class (table column):** 3\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.1 and 1.2", "class_b": "3", "code": "X", "file": "carriage-by-public-highway-explosives-3-1-1-and-1-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-3-1-1-and-1-2", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.1 and 1.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.3\n\n**Second hazard class (table column):** 3\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.3", "class_b": "3", "code": "X", "file": "carriage-by-public-highway-explosives-3-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-3-1-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.4\n\n**Second hazard class (table column):** 3\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.4", "class_b": "3", "code": "O", "file": "carriage-by-public-highway-explosives-3-1-4.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-3-1-4", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.4 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.1 and 1.2\n\n**Second hazard class (table column):** 4.1\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.1 and 1.2", "class_b": "4.1", "code": "X", "file": "carriage-by-public-highway-explosives-4-1-1-1-and-1-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-4-1-1-1-and-1-2", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.1 and 1.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.3\n\n**Second hazard class (table column):** 4.1\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.3", "class_b": "4.1", "file": "carriage-by-public-highway-explosives-4-1-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-4-1-1-3", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.4\n\n**Second hazard class (table column):** 4.1\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.4", "class_b": "4.1", "file": "carriage-by-public-highway-explosives-4-1-1-4.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-4-1-1-4", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.4 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.1 and 1.2\n\n**Second hazard class (table column):** 4.2\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.1 and 1.2", "class_b": "4.2", "code": "X", "file": "carriage-by-public-highway-explosives-4-2-1-1-and-1-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-4-2-1-1-and-1-2", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.1 and 1.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.3\n\n**Second hazard class (table column):** 4.2\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.3", "class_b": "4.2", "code": "X", "file": "carriage-by-public-highway-explosives-4-2-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-4-2-1-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.4\n\n**Second hazard class (table column):** 4.2\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.4", "class_b": "4.2", "code": "O", "file": "carriage-by-public-highway-explosives-4-2-1-4.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-4-2-1-4", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.4 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.1 and 1.2\n\n**Second hazard class (table column):** 4.3\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.1 and 1.2", "class_b": "4.3", "code": "X", "file": "carriage-by-public-highway-explosives-4-3-1-1-and-1-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-4-3-1-1-and-1-2", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.1 and 1.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.3\n\n**Second hazard class (table column):** 4.3\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.3", "class_b": "4.3", "code": "X", "file": "carriage-by-public-highway-explosives-4-3-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-4-3-1-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.4\n\n**Second hazard class (table column):** 4.3\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.4", "class_b": "4.3", "file": "carriage-by-public-highway-explosives-4-3-1-4.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-4-3-1-4", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.4 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.1 and 1.2\n\n**Second hazard class (table column):** 5.1\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.1 and 1.2", "class_b": "5.1", "code": "X", "file": "carriage-by-public-highway-explosives-5-1-1-1-and-1-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-5-1-1-1-and-1-2", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.1 and 1.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.3\n\n**Second hazard class (table column):** 5.1\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.3", "class_b": "5.1", "code": "X", "file": "carriage-by-public-highway-explosives-5-1-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-5-1-1-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.4\n\n**Second hazard class (table column):** 5.1\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.4", "class_b": "5.1", "file": "carriage-by-public-highway-explosives-5-1-1-4.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-5-1-1-4", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.4 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.1 and 1.2\n\n**Second hazard class (table column):** 5.2\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.1 and 1.2", "class_b": "5.2", "code": "X", "file": "carriage-by-public-highway-explosives-5-2-1-1-and-1-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-5-2-1-1-and-1-2", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.1 and 1.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.3\n\n**Second hazard class (table column):** 5.2\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.3", "class_b": "5.2", "code": "X", "file": "carriage-by-public-highway-explosives-5-2-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-5-2-1-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.4\n\n**Second hazard class (table column):** 5.2\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.4", "class_b": "5.2", "file": "carriage-by-public-highway-explosives-5-2-1-4.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-5-2-1-4", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.4 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.1 and 1.2\n\n**Second hazard class (table column):** 6.1 liquids PG I zone A\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.1 and 1.2", "class_b": "6.1 liquids PG I zone A", "code": "X", "file": "carriage-by-public-highway-explosives-6-1-liquids-pg-i-zone-a-1-1-and-1-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-6-1-liquids-pg-i-zone-a-1-1-and-1-2", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.1 and 1.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.3\n\n**Second hazard class (table column):** 6.1 liquids PG I zone A\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.3", "class_b": "6.1 liquids PG I zone A", "code": "X", "file": "carriage-by-public-highway-explosives-6-1-liquids-pg-i-zone-a-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-6-1-liquids-pg-i-zone-a-1-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.4\n\n**Second hazard class (table column):** 6.1 liquids PG I zone A\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.4", "class_b": "6.1 liquids PG I zone A", "code": "O", "file": "carriage-by-public-highway-explosives-6-1-liquids-pg-i-zone-a-1-4.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-6-1-liquids-pg-i-zone-a-1-4", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.4 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.1 and 1.2\n\n**Second hazard class (table column):** 7\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.1 and 1.2", "class_b": "7", "code": "X", "file": "carriage-by-public-highway-explosives-7-1-1-and-1-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-7-1-1-and-1-2", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.1 and 1.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.3\n\n**Second hazard class (table column):** 7\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.3", "class_b": "7", "file": "carriage-by-public-highway-explosives-7-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-7-1-3", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.4\n\n**Second hazard class (table column):** 7\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.4", "class_b": "7", "file": "carriage-by-public-highway-explosives-7-1-4.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-7-1-4", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.4 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.1 and 1.2\n\n**Second hazard class (table column):** 8 liquids only\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.1 and 1.2", "class_b": "8 liquids only", "code": "X", "file": "carriage-by-public-highway-explosives-8-liquids-only-1-1-and-1-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-8-liquids-only-1-1-and-1-2", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.1 and 1.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.3\n\n**Second hazard class (table column):** 8 liquids only\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.3", "class_b": "8 liquids only", "code": "X", "file": "carriage-by-public-highway-explosives-8-liquids-only-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-8-liquids-only-1-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.4\n\n**Second hazard class (table column):** 8 liquids only\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.4", "class_b": "8 liquids only", "code": "O", "file": "carriage-by-public-highway-explosives-8-liquids-only-1-4.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-8-liquids-only-1-4", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.4 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.1 and 1.2\n\n**Second hazard class (table column):** ammonium nitrate (UN1942)\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** A\n\n**What the code requires:** The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) .\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.1 and 1.2", "class_b": "ammonium nitrate (UN1942)", "code": "A", "file": "carriage-by-public-highway-explosives-ammonium-nitrate-un1942-1-1-and-1-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-explosives-ammonium-nitrate-un1942-1-1-and-1-2", "mode": "Carriage by Public Highway", "requirement": "The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) .", "row_name": "Explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.1 and 1.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.6\n\n**Second hazard class (table column):** 1.1 1.2\n\n**Row description:** Extremely insensitive explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** *\n\n**What the code requires:** The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.6", "class_b": "1.1 1.2", "code": "*", "file": "carriage-by-public-highway-extremely-insensitive-explosives-1-1-1-2-1-6.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-extremely-insensitive-explosives-1-1-1-2-1-6", "mode": "Carriage by Public Highway", "requirement": "The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.", "row_name": "Extremely insensitive explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.6 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.6\n\n**Second hazard class (table column):** 1.3\n\n**Row description:** Extremely insensitive explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** *\n\n**What the code requires:** The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.6", "class_b": "1.3", "code": "*", "file": "carriage-by-public-highway-extremely-insensitive-explosives-1-3-1-6.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-extremely-insensitive-explosives-1-3-1-6", "mode": "Carriage by Public Highway", "requirement": "The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.", "row_name": "Extremely insensitive explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.6 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.6\n\n**Second hazard class (table column):** 1.4\n\n**Row description:** Extremely insensitive explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** *\n\n**What the code requires:** The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.6", "class_b": "1.4", "code": "*", "file": "carriage-by-public-highway-extremely-insensitive-explosives-1-4-1-6.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-extremely-insensitive-explosives-1-4-1-6", "mode": "Carriage by Public Highway", "requirement": "The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.", "row_name": "Extremely insensitive explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.6 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.6\n\n**Second hazard class (table column):** 1.5\n\n**Row description:** Extremely insensitive explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** *\n\n**What the code requires:** The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.6", "class_b": "1.5", "code": "*", "file": "carriage-by-public-highway-extremely-insensitive-explosives-1-5-1-6.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-extremely-insensitive-explosives-1-5-1-6", "mode": "Carriage by Public Highway", "requirement": "The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.", "row_name": "Extremely insensitive explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.6 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.6\n\n**Second hazard class (table column):** 1.6\n\n**Row description:** Extremely insensitive explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** *\n\n**What the code requires:** The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.6", "class_b": "1.6", "code": "*", "file": "carriage-by-public-highway-extremely-insensitive-explosives-1-6-1-6.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-extremely-insensitive-explosives-1-6-1-6", "mode": "Carriage by Public Highway", "requirement": "The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.", "row_name": "Extremely insensitive explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.6 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.6\n\n**Second hazard class (table column):** 2.1\n\n**Row description:** Extremely insensitive explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.6", "class_b": "2.1", "file": "carriage-by-public-highway-extremely-insensitive-explosives-2-1-1-6.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-extremely-insensitive-explosives-2-1-1-6", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Extremely insensitive explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.6 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.6\n\n**Second hazard class (table column):** 2.2\n\n**Row description:** Extremely insensitive explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.6", "class_b": "2.2", "file": "carriage-by-public-highway-extremely-insensitive-explosives-2-2-1-6.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-extremely-insensitive-explosives-2-2-1-6", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Extremely insensitive explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.6 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.6\n\n**Second hazard class (table column):** 2.3 gas zone A\n\n**Row description:** Extremely insensitive explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.6", "class_b": "2.3 gas zone A", "file": "carriage-by-public-highway-extremely-insensitive-explosives-2-3-gas-zone-a-1-6.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-extremely-insensitive-explosives-2-3-gas-zone-a-1-6", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Extremely insensitive explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.6 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.6\n\n**Second hazard class (table column):** 2.3 gas Zone B\n\n**Row description:** Extremely insensitive explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.6", "class_b": "2.3 gas Zone B", "file": "carriage-by-public-highway-extremely-insensitive-explosives-2-3-gas-zone-b-1-6.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-extremely-insensitive-explosives-2-3-gas-zone-b-1-6", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Extremely insensitive explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.6 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.6\n\n**Second hazard class (table column):** 3\n\n**Row description:** Extremely insensitive explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.6", "class_b": "3", "file": "carriage-by-public-highway-extremely-insensitive-explosives-3-1-6.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-extremely-insensitive-explosives-3-1-6", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Extremely insensitive explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.6 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.6\n\n**Second hazard class (table column):** 4.1\n\n**Row description:** Extremely insensitive explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.6", "class_b": "4.1", "file": "carriage-by-public-highway-extremely-insensitive-explosives-4-1-1-6.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-extremely-insensitive-explosives-4-1-1-6", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Extremely insensitive explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.6 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.6\n\n**Second hazard class (table column):** 4.2\n\n**Row description:** Extremely insensitive explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.6", "class_b": "4.2", "file": "carriage-by-public-highway-extremely-insensitive-explosives-4-2-1-6.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-extremely-insensitive-explosives-4-2-1-6", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Extremely insensitive explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.6 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.6\n\n**Second hazard class (table column):** 4.3\n\n**Row description:** Extremely insensitive explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.6", "class_b": "4.3", "file": "carriage-by-public-highway-extremely-insensitive-explosives-4-3-1-6.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-extremely-insensitive-explosives-4-3-1-6", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Extremely insensitive explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.6 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.6\n\n**Second hazard class (table column):** 5.1\n\n**Row description:** Extremely insensitive explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.6", "class_b": "5.1", "file": "carriage-by-public-highway-extremely-insensitive-explosives-5-1-1-6.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-extremely-insensitive-explosives-5-1-1-6", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Extremely insensitive explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.6 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.6\n\n**Second hazard class (table column):** 5.2\n\n**Row description:** Extremely insensitive explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.6", "class_b": "5.2", "file": "carriage-by-public-highway-extremely-insensitive-explosives-5-2-1-6.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-extremely-insensitive-explosives-5-2-1-6", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Extremely insensitive explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.6 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.6\n\n**Second hazard class (table column):** 6.1 liquids PG I zone A\n\n**Row description:** Extremely insensitive explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.6", "class_b": "6.1 liquids PG I zone A", "file": "carriage-by-public-highway-extremely-insensitive-explosives-6-1-liquids-pg-i-zone-a-1-6.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-extremely-insensitive-explosives-6-1-liquids-pg-i-zone-a-1-6", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Extremely insensitive explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.6 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.6\n\n**Second hazard class (table column):** 7\n\n**Row description:** Extremely insensitive explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.6", "class_b": "7", "file": "carriage-by-public-highway-extremely-insensitive-explosives-7-1-6.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-extremely-insensitive-explosives-7-1-6", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Extremely insensitive explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.6 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.6\n\n**Second hazard class (table column):** 8 liquids only\n\n**Row description:** Extremely insensitive explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.6", "class_b": "8 liquids only", "file": "carriage-by-public-highway-extremely-insensitive-explosives-8-liquids-only-1-6.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-extremely-insensitive-explosives-8-liquids-only-1-6", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Extremely insensitive explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.6 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.1\n\n**Second hazard class (table column):** 1.1 1.2\n\n**Row description:** Flammable gases\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.1", "class_b": "1.1 1.2", "code": "X", "file": "carriage-by-public-highway-flammable-gases-1-1-1-2-2-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-gases-1-1-1-2-2-1", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Flammable gases", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.1\n\n**Second hazard class (table column):** 1.3\n\n**Row description:** Flammable gases\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.1", "class_b": "1.3", "code": "X", "file": "carriage-by-public-highway-flammable-gases-1-3-2-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-gases-1-3-2-1", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Flammable gases", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.1\n\n**Second hazard class (table column):** 1.4\n\n**Row description:** Flammable gases\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.1", "class_b": "1.4", "code": "O", "file": "carriage-by-public-highway-flammable-gases-1-4-2-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-gases-1-4-2-1", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Flammable gases", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.1\n\n**Second hazard class (table column):** 1.5\n\n**Row description:** Flammable gases\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.1", "class_b": "1.5", "code": "X", "file": "carriage-by-public-highway-flammable-gases-1-5-2-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-gases-1-5-2-1", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Flammable gases", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.1\n\n**Second hazard class (table column):** 1.6\n\n**Row description:** Flammable gases\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.1", "class_b": "1.6", "file": "carriage-by-public-highway-flammable-gases-1-6-2-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-gases-1-6-2-1", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Flammable gases", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.1\n\n**Second hazard class (table column):** 2.1\n\n**Row description:** Flammable gases\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.1", "class_b": "2.1", "file": "carriage-by-public-highway-flammable-gases-2-1-2-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-gases-2-1-2-1", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Flammable gases", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.1\n\n**Second hazard class (table column):** 2.2\n\n**Row description:** Flammable gases\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.1", "class_b": "2.2", "file": "carriage-by-public-highway-flammable-gases-2-2-2-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-gases-2-2-2-1", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Flammable gases", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.1\n\n**Second hazard class (table column):** 2.3 gas zone A\n\n**Row description:** Flammable gases\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.1", "class_b": "2.3 gas zone A", "code": "X", "file": "carriage-by-public-highway-flammable-gases-2-3-gas-zone-a-2-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-gases-2-3-gas-zone-a-2-1", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Flammable gases", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.1\n\n**Second hazard class (table column):** 2.3 gas Zone B\n\n**Row description:** Flammable gases\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.1", "class_b": "2.3 gas Zone B", "code": "O", "file": "carriage-by-public-highway-flammable-gases-2-3-gas-zone-b-2-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-gases-2-3-gas-zone-b-2-1", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Flammable gases", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.1\n\n**Second hazard class (table column):** 3\n\n**Row description:** Flammable gases\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.1", "class_b": "3", "file": "carriage-by-public-highway-flammable-gases-3-2-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-gases-3-2-1", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Flammable gases", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.1\n\n**Second hazard class (table column):** 4.1\n\n**Row description:** Flammable gases\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.1", "class_b": "4.1", "file": "carriage-by-public-highway-flammable-gases-4-1-2-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-gases-4-1-2-1", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Flammable gases", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.1\n\n**Second hazard class (table column):** 4.2\n\n**Row description:** Flammable gases\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.1", "class_b": "4.2", "file": "carriage-by-public-highway-flammable-gases-4-2-2-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-gases-4-2-2-1", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Flammable gases", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.1\n\n**Second hazard class (table column):** 4.3\n\n**Row description:** Flammable gases\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.1", "class_b": "4.3", "file": "carriage-by-public-highway-flammable-gases-4-3-2-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-gases-4-3-2-1", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Flammable gases", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.1\n\n**Second hazard class (table column):** 5.1\n\n**Row description:** Flammable gases\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.1", "class_b": "5.1", "file": "carriage-by-public-highway-flammable-gases-5-1-2-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-gases-5-1-2-1", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Flammable gases", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.1\n\n**Second hazard class (table column):** 5.2\n\n**Row description:** Flammable gases\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.1", "class_b": "5.2", "file": "carriage-by-public-highway-flammable-gases-5-2-2-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-gases-5-2-2-1", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Flammable gases", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.1\n\n**Second hazard class (table column):** 6.1 liquids PG I zone A\n\n**Row description:** Flammable gases\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.1", "class_b": "6.1 liquids PG I zone A", "code": "O", "file": "carriage-by-public-highway-flammable-gases-6-1-liquids-pg-i-zone-a-2-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-gases-6-1-liquids-pg-i-zone-a-2-1", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Flammable gases", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.1\n\n**Second hazard class (table column):** 7\n\n**Row description:** Flammable gases\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.1", "class_b": "7", "code": "O", "file": "carriage-by-public-highway-flammable-gases-7-2-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-gases-7-2-1", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Flammable gases", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.1\n\n**Second hazard class (table column):** 8 liquids only\n\n**Row description:** Flammable gases\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.1", "class_b": "8 liquids only", "file": "carriage-by-public-highway-flammable-gases-8-liquids-only-2-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-gases-8-liquids-only-2-1", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Flammable gases", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 3\n\n**Second hazard class (table column):** 1.1 1.2\n\n**Row description:** Flammable liquids\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "3", "class_b": "1.1 1.2", "code": "X", "file": "carriage-by-public-highway-flammable-liquids-1-1-1-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-liquids-1-1-1-2-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Flammable liquids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 3\n\n**Second hazard class (table column):** 1.3\n\n**Row description:** Flammable liquids\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "3", "class_b": "1.3", "code": "X", "file": "carriage-by-public-highway-flammable-liquids-1-3-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-liquids-1-3-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Flammable liquids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 3\n\n**Second hazard class (table column):** 1.4\n\n**Row description:** Flammable liquids\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "3", "class_b": "1.4", "code": "O", "file": "carriage-by-public-highway-flammable-liquids-1-4-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-liquids-1-4-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Flammable liquids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 3\n\n**Second hazard class (table column):** 1.5\n\n**Row description:** Flammable liquids\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "3", "class_b": "1.5", "code": "X", "file": "carriage-by-public-highway-flammable-liquids-1-5-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-liquids-1-5-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Flammable liquids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 3\n\n**Second hazard class (table column):** 1.6\n\n**Row description:** Flammable liquids\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "3", "class_b": "1.6", "file": "carriage-by-public-highway-flammable-liquids-1-6-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-liquids-1-6-3", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Flammable liquids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 3\n\n**Second hazard class (table column):** 2.1\n\n**Row description:** Flammable liquids\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "3", "class_b": "2.1", "file": "carriage-by-public-highway-flammable-liquids-2-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-liquids-2-1-3", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Flammable liquids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 3\n\n**Second hazard class (table column):** 2.2\n\n**Row description:** Flammable liquids\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "3", "class_b": "2.2", "file": "carriage-by-public-highway-flammable-liquids-2-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-liquids-2-2-3", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Flammable liquids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 3\n\n**Second hazard class (table column):** 2.3 gas zone A\n\n**Row description:** Flammable liquids\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "3", "class_b": "2.3 gas zone A", "code": "X", "file": "carriage-by-public-highway-flammable-liquids-2-3-gas-zone-a-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-liquids-2-3-gas-zone-a-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Flammable liquids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 3\n\n**Second hazard class (table column):** 2.3 gas Zone B\n\n**Row description:** Flammable liquids\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "3", "class_b": "2.3 gas Zone B", "code": "O", "file": "carriage-by-public-highway-flammable-liquids-2-3-gas-zone-b-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-liquids-2-3-gas-zone-b-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Flammable liquids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 3\n\n**Second hazard class (table column):** 3\n\n**Row description:** Flammable liquids\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "3", "class_b": "3", "file": "carriage-by-public-highway-flammable-liquids-3-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-liquids-3-3", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Flammable liquids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 3\n\n**Second hazard class (table column):** 4.1\n\n**Row description:** Flammable liquids\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "3", "class_b": "4.1", "file": "carriage-by-public-highway-flammable-liquids-4-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-liquids-4-1-3", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Flammable liquids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 3\n\n**Second hazard class (table column):** 4.2\n\n**Row description:** Flammable liquids\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "3", "class_b": "4.2", "file": "carriage-by-public-highway-flammable-liquids-4-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-liquids-4-2-3", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Flammable liquids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 3\n\n**Second hazard class (table column):** 4.3\n\n**Row description:** Flammable liquids\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "3", "class_b": "4.3", "file": "carriage-by-public-highway-flammable-liquids-4-3-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-liquids-4-3-3", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Flammable liquids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 3\n\n**Second hazard class (table column):** 5.1\n\n**Row description:** Flammable liquids\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "3", "class_b": "5.1", "code": "O", "file": "carriage-by-public-highway-flammable-liquids-5-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-liquids-5-1-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Flammable liquids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 3\n\n**Second hazard class (table column):** 5.2\n\n**Row description:** Flammable liquids\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "3", "class_b": "5.2", "file": "carriage-by-public-highway-flammable-liquids-5-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-liquids-5-2-3", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Flammable liquids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 3\n\n**Second hazard class (table column):** 6.1 liquids PG I zone A\n\n**Row description:** Flammable liquids\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "3", "class_b": "6.1 liquids PG I zone A", "code": "X", "file": "carriage-by-public-highway-flammable-liquids-6-1-liquids-pg-i-zone-a-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-liquids-6-1-liquids-pg-i-zone-a-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Flammable liquids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 3\n\n**Second hazard class (table column):** 7\n\n**Row description:** Flammable liquids\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "3", "class_b": "7", "file": "carriage-by-public-highway-flammable-liquids-7-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-liquids-7-3", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Flammable liquids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 3\n\n**Second hazard class (table column):** 8 liquids only\n\n**Row description:** Flammable liquids\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "3", "class_b": "8 liquids only", "file": "carriage-by-public-highway-flammable-liquids-8-liquids-only-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-liquids-8-liquids-only-3", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Flammable liquids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.1\n\n**Second hazard class (table column):** 1.1 1.2\n\n**Row description:** Flammable solids\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.1", "class_b": "1.1 1.2", "code": "X", "file": "carriage-by-public-highway-flammable-solids-1-1-1-2-4-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-solids-1-1-1-2-4-1", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Flammable solids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.1\n\n**Second hazard class (table column):** 1.3\n\n**Row description:** Flammable solids\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.1", "class_b": "1.3", "file": "carriage-by-public-highway-flammable-solids-1-3-4-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-solids-1-3-4-1", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Flammable solids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.1\n\n**Second hazard class (table column):** 1.4\n\n**Row description:** Flammable solids\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.1", "class_b": "1.4", "file": "carriage-by-public-highway-flammable-solids-1-4-4-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-solids-1-4-4-1", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Flammable solids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.1\n\n**Second hazard class (table column):** 1.5\n\n**Row description:** Flammable solids\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.1", "class_b": "1.5", "code": "X", "file": "carriage-by-public-highway-flammable-solids-1-5-4-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-solids-1-5-4-1", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Flammable solids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.1\n\n**Second hazard class (table column):** 1.6\n\n**Row description:** Flammable solids\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.1", "class_b": "1.6", "file": "carriage-by-public-highway-flammable-solids-1-6-4-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-solids-1-6-4-1", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Flammable solids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.1\n\n**Second hazard class (table column):** 2.1\n\n**Row description:** Flammable solids\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.1", "class_b": "2.1", "file": "carriage-by-public-highway-flammable-solids-2-1-4-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-solids-2-1-4-1", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Flammable solids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.1\n\n**Second hazard class (table column):** 2.2\n\n**Row description:** Flammable solids\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.1", "class_b": "2.2", "file": "carriage-by-public-highway-flammable-solids-2-2-4-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-solids-2-2-4-1", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Flammable solids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.1\n\n**Second hazard class (table column):** 2.3 gas zone A\n\n**Row description:** Flammable solids\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.1", "class_b": "2.3 gas zone A", "code": "X", "file": "carriage-by-public-highway-flammable-solids-2-3-gas-zone-a-4-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-solids-2-3-gas-zone-a-4-1", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Flammable solids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.1\n\n**Second hazard class (table column):** 2.3 gas Zone B\n\n**Row description:** Flammable solids\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.1", "class_b": "2.3 gas Zone B", "code": "O", "file": "carriage-by-public-highway-flammable-solids-2-3-gas-zone-b-4-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-solids-2-3-gas-zone-b-4-1", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Flammable solids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.1\n\n**Second hazard class (table column):** 3\n\n**Row description:** Flammable solids\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.1", "class_b": "3", "file": "carriage-by-public-highway-flammable-solids-3-4-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-solids-3-4-1", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Flammable solids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.1\n\n**Second hazard class (table column):** 4.1\n\n**Row description:** Flammable solids\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.1", "class_b": "4.1", "file": "carriage-by-public-highway-flammable-solids-4-1-4-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-solids-4-1-4-1", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Flammable solids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.1\n\n**Second hazard class (table column):** 4.2\n\n**Row description:** Flammable solids\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.1", "class_b": "4.2", "file": "carriage-by-public-highway-flammable-solids-4-2-4-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-solids-4-2-4-1", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Flammable solids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.1\n\n**Second hazard class (table column):** 4.3\n\n**Row description:** Flammable solids\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.1", "class_b": "4.3", "file": "carriage-by-public-highway-flammable-solids-4-3-4-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-solids-4-3-4-1", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Flammable solids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.1\n\n**Second hazard class (table column):** 5.1\n\n**Row description:** Flammable solids\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.1", "class_b": "5.1", "file": "carriage-by-public-highway-flammable-solids-5-1-4-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-solids-5-1-4-1", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Flammable solids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.1\n\n**Second hazard class (table column):** 5.2\n\n**Row description:** Flammable solids\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.1", "class_b": "5.2", "file": "carriage-by-public-highway-flammable-solids-5-2-4-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-solids-5-2-4-1", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Flammable solids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.1\n\n**Second hazard class (table column):** 6.1 liquids PG I zone A\n\n**Row description:** Flammable solids\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.1", "class_b": "6.1 liquids PG I zone A", "code": "X", "file": "carriage-by-public-highway-flammable-solids-6-1-liquids-pg-i-zone-a-4-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-solids-6-1-liquids-pg-i-zone-a-4-1", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Flammable solids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.1\n\n**Second hazard class (table column):** 7\n\n**Row description:** Flammable solids\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.1", "class_b": "7", "file": "carriage-by-public-highway-flammable-solids-7-4-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-solids-7-4-1", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Flammable solids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.1\n\n**Second hazard class (table column):** 8 liquids only\n\n**Row description:** Flammable solids\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.1", "class_b": "8 liquids only", "code": "O", "file": "carriage-by-public-highway-flammable-solids-8-liquids-only-4-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-flammable-solids-8-liquids-only-4-1", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Flammable solids", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.2\n\n**Second hazard class (table column):** 1.1 1.2\n\n**Row description:** Non-toxic, non-flammable gases\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.2", "class_b": "1.1 1.2", "code": "X", "file": "carriage-by-public-highway-non-toxic-non-flammable-gases-1-1-1-2-2-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-non-toxic-non-flammable-gases-1-1-1-2-2-2", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Non-toxic, non-flammable gases", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.2\n\n**Second hazard class (table column):** 1.3\n\n**Row description:** Non-toxic, non-flammable gases\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.2", "class_b": "1.3", "file": "carriage-by-public-highway-non-toxic-non-flammable-gases-1-3-2-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-non-toxic-non-flammable-gases-1-3-2-2", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Non-toxic, non-flammable gases", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.2\n\n**Second hazard class (table column):** 1.4\n\n**Row description:** Non-toxic, non-flammable gases\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.2", "class_b": "1.4", "file": "carriage-by-public-highway-non-toxic-non-flammable-gases-1-4-2-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-non-toxic-non-flammable-gases-1-4-2-2", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Non-toxic, non-flammable gases", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.2\n\n**Second hazard class (table column):** 1.5\n\n**Row description:** Non-toxic, non-flammable gases\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.2", "class_b": "1.5", "code": "X", "file": "carriage-by-public-highway-non-toxic-non-flammable-gases-1-5-2-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-non-toxic-non-flammable-gases-1-5-2-2", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Non-toxic, non-flammable gases", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.2\n\n**Second hazard class (table column):** 1.6\n\n**Row description:** Non-toxic, non-flammable gases\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.2", "class_b": "1.6", "file": "carriage-by-public-highway-non-toxic-non-flammable-gases-1-6-2-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-non-toxic-non-flammable-gases-1-6-2-2", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Non-toxic, non-flammable gases", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.2\n\n**Second hazard class (table column):** 2.1\n\n**Row description:** Non-toxic, non-flammable gases\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.2", "class_b": "2.1", "file": "carriage-by-public-highway-non-toxic-non-flammable-gases-2-1-2-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-non-toxic-non-flammable-gases-2-1-2-2", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Non-toxic, non-flammable gases", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.2\n\n**Second hazard class (table column):** 2.2\n\n**Row description:** Non-toxic, non-flammable gases\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.2", "class_b": "2.2", "file": "carriage-by-public-highway-non-toxic-non-flammable-gases-2-2-2-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-non-toxic-non-flammable-gases-2-2-2-2", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Non-toxic, non-flammable gases", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.2\n\n**Second hazard class (table column):** 2.3 gas zone A\n\n**Row description:** Non-toxic, non-flammable gases\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.2", "class_b": "2.3 gas zone A", "file": "carriage-by-public-highway-non-toxic-non-flammable-gases-2-3-gas-zone-a-2-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-non-toxic-non-flammable-gases-2-3-gas-zone-a-2-2", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Non-toxic, non-flammable gases", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.2\n\n**Second hazard class (table column):** 2.3 gas Zone B\n\n**Row description:** Non-toxic, non-flammable gases\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.2", "class_b": "2.3 gas Zone B", "file": "carriage-by-public-highway-non-toxic-non-flammable-gases-2-3-gas-zone-b-2-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-non-toxic-non-flammable-gases-2-3-gas-zone-b-2-2", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Non-toxic, non-flammable gases", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.2\n\n**Second hazard class (table column):** 3\n\n**Row description:** Non-toxic, non-flammable gases\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.2", "class_b": "3", "file": "carriage-by-public-highway-non-toxic-non-flammable-gases-3-2-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-non-toxic-non-flammable-gases-3-2-2", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Non-toxic, non-flammable gases", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.2\n\n**Second hazard class (table column):** 4.1\n\n**Row description:** Non-toxic, non-flammable gases\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.2", "class_b": "4.1", "file": "carriage-by-public-highway-non-toxic-non-flammable-gases-4-1-2-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-non-toxic-non-flammable-gases-4-1-2-2", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Non-toxic, non-flammable gases", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.2\n\n**Second hazard class (table column):** 4.2\n\n**Row description:** Non-toxic, non-flammable gases\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.2", "class_b": "4.2", "file": "carriage-by-public-highway-non-toxic-non-flammable-gases-4-2-2-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-non-toxic-non-flammable-gases-4-2-2-2", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Non-toxic, non-flammable gases", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.2\n\n**Second hazard class (table column):** 4.3\n\n**Row description:** Non-toxic, non-flammable gases\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.2", "class_b": "4.3", "file": "carriage-by-public-highway-non-toxic-non-flammable-gases-4-3-2-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-non-toxic-non-flammable-gases-4-3-2-2", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Non-toxic, non-flammable gases", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.2\n\n**Second hazard class (table column):** 5.1\n\n**Row description:** Non-toxic, non-flammable gases\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.2", "class_b": "5.1", "file": "carriage-by-public-highway-non-toxic-non-flammable-gases-5-1-2-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-non-toxic-non-flammable-gases-5-1-2-2", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Non-toxic, non-flammable gases", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.2\n\n**Second hazard class (table column):** 5.2\n\n**Row description:** Non-toxic, non-flammable gases\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.2", "class_b": "5.2", "file": "carriage-by-public-highway-non-toxic-non-flammable-gases-5-2-2-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-non-toxic-non-flammable-gases-5-2-2-2", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Non-toxic, non-flammable gases", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.2\n\n**Second hazard class (table column):** 6.1 liquids PG I zone A\n\n**Row description:** Non-toxic, non-flammable gases\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.2", "class_b": "6.1 liquids PG I zone A", "file": "carriage-by-public-highway-non-toxic-non-flammable-gases-6-1-liquids-pg-i-zone-a-2-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-non-toxic-non-flammable-gases-6-1-liquids-pg-i-zone-a-2-2", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Non-toxic, non-flammable gases", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.2\n\n**Second hazard class (table column):** 7\n\n**Row description:** Non-toxic, non-flammable gases\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.2", "class_b": "7", "file": "carriage-by-public-highway-non-toxic-non-flammable-gases-7-2-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-non-toxic-non-flammable-gases-7-2-2", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Non-toxic, non-flammable gases", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.2\n\n**Second hazard class (table column):** 8 liquids only\n\n**Row description:** Non-toxic, non-flammable gases\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.2", "class_b": "8 liquids only", "file": "carriage-by-public-highway-non-toxic-non-flammable-gases-8-liquids-only-2-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-non-toxic-non-flammable-gases-8-liquids-only-2-2", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Non-toxic, non-flammable gases", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.2\n\n**Second hazard class (table column):** 1.1 1.2\n\n**Row description:** Organic peroxides\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "5.2", "class_b": "1.1 1.2", "code": "X", "file": "carriage-by-public-highway-organic-peroxides-1-1-1-2-5-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-organic-peroxides-1-1-1-2-5-2", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Organic peroxides", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "5.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.2\n\n**Second hazard class (table column):** 1.3\n\n**Row description:** Organic peroxides\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "5.2", "class_b": "1.3", "code": "X", "file": "carriage-by-public-highway-organic-peroxides-1-3-5-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-organic-peroxides-1-3-5-2", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Organic peroxides", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "5.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.2\n\n**Second hazard class (table column):** 1.4\n\n**Row description:** Organic peroxides\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "5.2", "class_b": "1.4", "file": "carriage-by-public-highway-organic-peroxides-1-4-5-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-organic-peroxides-1-4-5-2", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Organic peroxides", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "5.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.2\n\n**Second hazard class (table column):** 1.5\n\n**Row description:** Organic peroxides\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "5.2", "class_b": "1.5", "code": "X", "file": "carriage-by-public-highway-organic-peroxides-1-5-5-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-organic-peroxides-1-5-5-2", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Organic peroxides", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "5.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.2\n\n**Second hazard class (table column):** 1.6\n\n**Row description:** Organic peroxides\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "5.2", "class_b": "1.6", "file": "carriage-by-public-highway-organic-peroxides-1-6-5-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-organic-peroxides-1-6-5-2", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Organic peroxides", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "5.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.2\n\n**Second hazard class (table column):** 2.1\n\n**Row description:** Organic peroxides\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "5.2", "class_b": "2.1", "file": "carriage-by-public-highway-organic-peroxides-2-1-5-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-organic-peroxides-2-1-5-2", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Organic peroxides", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "5.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.2\n\n**Second hazard class (table column):** 2.2\n\n**Row description:** Organic peroxides\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "5.2", "class_b": "2.2", "file": "carriage-by-public-highway-organic-peroxides-2-2-5-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-organic-peroxides-2-2-5-2", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Organic peroxides", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "5.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.2\n\n**Second hazard class (table column):** 2.3 gas zone A\n\n**Row description:** Organic peroxides\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "5.2", "class_b": "2.3 gas zone A", "code": "X", "file": "carriage-by-public-highway-organic-peroxides-2-3-gas-zone-a-5-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-organic-peroxides-2-3-gas-zone-a-5-2", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Organic peroxides", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "5.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.2\n\n**Second hazard class (table column):** 2.3 gas Zone B\n\n**Row description:** Organic peroxides\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "5.2", "class_b": "2.3 gas Zone B", "code": "O", "file": "carriage-by-public-highway-organic-peroxides-2-3-gas-zone-b-5-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-organic-peroxides-2-3-gas-zone-b-5-2", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Organic peroxides", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "5.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.2\n\n**Second hazard class (table column):** 3\n\n**Row description:** Organic peroxides\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "5.2", "class_b": "3", "file": "carriage-by-public-highway-organic-peroxides-3-5-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-organic-peroxides-3-5-2", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Organic peroxides", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "5.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.2\n\n**Second hazard class (table column):** 4.1\n\n**Row description:** Organic peroxides\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "5.2", "class_b": "4.1", "file": "carriage-by-public-highway-organic-peroxides-4-1-5-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-organic-peroxides-4-1-5-2", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Organic peroxides", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "5.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.2\n\n**Second hazard class (table column):** 4.2\n\n**Row description:** Organic peroxides\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "5.2", "class_b": "4.2", "file": "carriage-by-public-highway-organic-peroxides-4-2-5-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-organic-peroxides-4-2-5-2", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Organic peroxides", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "5.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.2\n\n**Second hazard class (table column):** 4.3\n\n**Row description:** Organic peroxides\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "5.2", "class_b": "4.3", "file": "carriage-by-public-highway-organic-peroxides-4-3-5-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-organic-peroxides-4-3-5-2", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Organic peroxides", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "5.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.2\n\n**Second hazard class (table column):** 5.1\n\n**Row description:** Organic peroxides\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "5.2", "class_b": "5.1", "file": "carriage-by-public-highway-organic-peroxides-5-1-5-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-organic-peroxides-5-1-5-2", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Organic peroxides", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "5.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.2\n\n**Second hazard class (table column):** 5.2\n\n**Row description:** Organic peroxides\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "5.2", "class_b": "5.2", "file": "carriage-by-public-highway-organic-peroxides-5-2-5-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-organic-peroxides-5-2-5-2", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Organic peroxides", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "5.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.2\n\n**Second hazard class (table column):** 6.1 liquids PG I zone A\n\n**Row description:** Organic peroxides\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "5.2", "class_b": "6.1 liquids PG I zone A", "code": "X", "file": "carriage-by-public-highway-organic-peroxides-6-1-liquids-pg-i-zone-a-5-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-organic-peroxides-6-1-liquids-pg-i-zone-a-5-2", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Organic peroxides", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "5.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.2\n\n**Second hazard class (table column):** 7\n\n**Row description:** Organic peroxides\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "5.2", "class_b": "7", "file": "carriage-by-public-highway-organic-peroxides-7-5-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-organic-peroxides-7-5-2", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Organic peroxides", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "5.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.2\n\n**Second hazard class (table column):** 8 liquids only\n\n**Row description:** Organic peroxides\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "5.2", "class_b": "8 liquids only", "code": "O", "file": "carriage-by-public-highway-organic-peroxides-8-liquids-only-5-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-organic-peroxides-8-liquids-only-5-2", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Organic peroxides", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "5.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.1\n\n**Second hazard class (table column):** 1.1 1.2\n\n**Row description:** Oxidizers\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "5.1", "class_b": "1.1 1.2", "code": "X", "file": "carriage-by-public-highway-oxidizers-1-1-1-2-5-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-oxidizers-1-1-1-2-5-1", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Oxidizers", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "5.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.1\n\n**Second hazard class (table column):** 1.3\n\n**Row description:** Oxidizers\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "5.1", "class_b": "1.3", "code": "X", "file": "carriage-by-public-highway-oxidizers-1-3-5-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-oxidizers-1-3-5-1", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Oxidizers", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "5.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.1\n\n**Second hazard class (table column):** 1.4\n\n**Row description:** Oxidizers\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "5.1", "class_b": "1.4", "file": "carriage-by-public-highway-oxidizers-1-4-5-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-oxidizers-1-4-5-1", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Oxidizers", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "5.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.1\n\n**Second hazard class (table column):** 1.5\n\n**Row description:** Oxidizers\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "5.1", "class_b": "1.5", "code": "X", "file": "carriage-by-public-highway-oxidizers-1-5-5-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-oxidizers-1-5-5-1", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Oxidizers", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "5.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.1\n\n**Second hazard class (table column):** 1.6\n\n**Row description:** Oxidizers\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "5.1", "class_b": "1.6", "file": "carriage-by-public-highway-oxidizers-1-6-5-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-oxidizers-1-6-5-1", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Oxidizers", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "5.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.1\n\n**Second hazard class (table column):** 2.1\n\n**Row description:** Oxidizers\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "5.1", "class_b": "2.1", "file": "carriage-by-public-highway-oxidizers-2-1-5-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-oxidizers-2-1-5-1", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Oxidizers", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "5.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.1\n\n**Second hazard class (table column):** 2.2\n\n**Row description:** Oxidizers\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "5.1", "class_b": "2.2", "file": "carriage-by-public-highway-oxidizers-2-2-5-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-oxidizers-2-2-5-1", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Oxidizers", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "5.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.1\n\n**Second hazard class (table column):** 2.3 gas zone A\n\n**Row description:** Oxidizers\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "5.1", "class_b": "2.3 gas zone A", "code": "X", "file": "carriage-by-public-highway-oxidizers-2-3-gas-zone-a-5-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-oxidizers-2-3-gas-zone-a-5-1", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Oxidizers", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "5.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.1\n\n**Second hazard class (table column):** 2.3 gas Zone B\n\n**Row description:** Oxidizers\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "5.1", "class_b": "2.3 gas Zone B", "code": "O", "file": "carriage-by-public-highway-oxidizers-2-3-gas-zone-b-5-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-oxidizers-2-3-gas-zone-b-5-1", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Oxidizers", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "5.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.1\n\n**Second hazard class (table column):** 3\n\n**Row description:** Oxidizers\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "5.1", "class_b": "3", "code": "O", "file": "carriage-by-public-highway-oxidizers-3-5-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-oxidizers-3-5-1", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Oxidizers", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "5.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.1\n\n**Second hazard class (table column):** 4.1\n\n**Row description:** Oxidizers\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "5.1", "class_b": "4.1", "file": "carriage-by-public-highway-oxidizers-4-1-5-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-oxidizers-4-1-5-1", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Oxidizers", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "5.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.1\n\n**Second hazard class (table column):** 4.2\n\n**Row description:** Oxidizers\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "5.1", "class_b": "4.2", "file": "carriage-by-public-highway-oxidizers-4-2-5-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-oxidizers-4-2-5-1", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Oxidizers", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "5.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.1\n\n**Second hazard class (table column):** 4.3\n\n**Row description:** Oxidizers\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "5.1", "class_b": "4.3", "file": "carriage-by-public-highway-oxidizers-4-3-5-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-oxidizers-4-3-5-1", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Oxidizers", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "5.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.1\n\n**Second hazard class (table column):** 5.1\n\n**Row description:** Oxidizers\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "5.1", "class_b": "5.1", "file": "carriage-by-public-highway-oxidizers-5-1-5-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-oxidizers-5-1-5-1", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Oxidizers", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "5.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.1\n\n**Second hazard class (table column):** 5.2\n\n**Row description:** Oxidizers\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "5.1", "class_b": "5.2", "file": "carriage-by-public-highway-oxidizers-5-2-5-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-oxidizers-5-2-5-1", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Oxidizers", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "5.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.1\n\n**Second hazard class (table column):** 6.1 liquids PG I zone A\n\n**Row description:** Oxidizers\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "5.1", "class_b": "6.1 liquids PG I zone A", "code": "X", "file": "carriage-by-public-highway-oxidizers-6-1-liquids-pg-i-zone-a-5-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-oxidizers-6-1-liquids-pg-i-zone-a-5-1", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Oxidizers", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "5.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.1\n\n**Second hazard class (table column):** 7\n\n**Row description:** Oxidizers\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "5.1", "class_b": "7", "file": "carriage-by-public-highway-oxidizers-7-5-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-oxidizers-7-5-1", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Oxidizers", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "5.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.1\n\n**Second hazard class (table column):** 8 liquids only\n\n**Row description:** Oxidizers\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "5.1", "class_b": "8 liquids only", "code": "O", "file": "carriage-by-public-highway-oxidizers-8-liquids-only-5-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-oxidizers-8-liquids-only-5-1", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Oxidizers", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "5.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.1\n\n**Second hazard class (table column):** ammonium nitrate (UN1942)\n\n**Row description:** Oxidizers\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** A\n\n**What the code requires:** The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) .\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "5.1", "class_b": "ammonium nitrate (UN1942)", "code": "A", "file": "carriage-by-public-highway-oxidizers-ammonium-nitrate-un1942-5-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-oxidizers-ammonium-nitrate-un1942-5-1", "mode": "Carriage by Public Highway", "requirement": "The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) .", "row_name": "Oxidizers", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "5.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 1.1 1.2\n\n**Row description:** Poisonous gas Zone A\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.3", "class_b": "1.1 1.2", "code": "X", "file": "carriage-by-public-highway-poisonous-gas-zone-a-1-1-1-2-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-gas-zone-a-1-1-1-2-2-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Poisonous gas Zone A", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 1.3\n\n**Row description:** Poisonous gas Zone A\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.3", "class_b": "1.3", "code": "X", "file": "carriage-by-public-highway-poisonous-gas-zone-a-1-3-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-gas-zone-a-1-3-2-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Poisonous gas Zone A", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 1.4\n\n**Row description:** Poisonous gas Zone A\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.3", "class_b": "1.4", "code": "O", "file": "carriage-by-public-highway-poisonous-gas-zone-a-1-4-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-gas-zone-a-1-4-2-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Poisonous gas Zone A", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 1.5\n\n**Row description:** Poisonous gas Zone A\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.3", "class_b": "1.5", "code": "X", "file": "carriage-by-public-highway-poisonous-gas-zone-a-1-5-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-gas-zone-a-1-5-2-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Poisonous gas Zone A", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 1.6\n\n**Row description:** Poisonous gas Zone A\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.3", "class_b": "1.6", "file": "carriage-by-public-highway-poisonous-gas-zone-a-1-6-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-gas-zone-a-1-6-2-3", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Poisonous gas Zone A", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 2.1\n\n**Row description:** Poisonous gas Zone A\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.3", "class_b": "2.1", "code": "X", "file": "carriage-by-public-highway-poisonous-gas-zone-a-2-1-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-gas-zone-a-2-1-2-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Poisonous gas Zone A", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 2.2\n\n**Row description:** Poisonous gas Zone A\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.3", "class_b": "2.2", "file": "carriage-by-public-highway-poisonous-gas-zone-a-2-2-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-gas-zone-a-2-2-2-3", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Poisonous gas Zone A", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 2.3 gas zone A\n\n**Row description:** Poisonous gas Zone A\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.3", "class_b": "2.3 gas zone A", "file": "carriage-by-public-highway-poisonous-gas-zone-a-2-3-gas-zone-a-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-gas-zone-a-2-3-gas-zone-a-2-3", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Poisonous gas Zone A", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 2.3 gas Zone B\n\n**Row description:** Poisonous gas Zone A\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.3", "class_b": "2.3 gas Zone B", "file": "carriage-by-public-highway-poisonous-gas-zone-a-2-3-gas-zone-b-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-gas-zone-a-2-3-gas-zone-b-2-3", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Poisonous gas Zone A", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 3\n\n**Row description:** Poisonous gas Zone A\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.3", "class_b": "3", "code": "X", "file": "carriage-by-public-highway-poisonous-gas-zone-a-3-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-gas-zone-a-3-2-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Poisonous gas Zone A", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 4.1\n\n**Row description:** Poisonous gas Zone A\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.3", "class_b": "4.1", "code": "X", "file": "carriage-by-public-highway-poisonous-gas-zone-a-4-1-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-gas-zone-a-4-1-2-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Poisonous gas Zone A", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 4.2\n\n**Row description:** Poisonous gas Zone A\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.3", "class_b": "4.2", "code": "X", "file": "carriage-by-public-highway-poisonous-gas-zone-a-4-2-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-gas-zone-a-4-2-2-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Poisonous gas Zone A", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 4.3\n\n**Row description:** Poisonous gas Zone A\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.3", "class_b": "4.3", "code": "X", "file": "carriage-by-public-highway-poisonous-gas-zone-a-4-3-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-gas-zone-a-4-3-2-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Poisonous gas Zone A", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 5.1\n\n**Row description:** Poisonous gas Zone A\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.3", "class_b": "5.1", "code": "X", "file": "carriage-by-public-highway-poisonous-gas-zone-a-5-1-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-gas-zone-a-5-1-2-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Poisonous gas Zone A", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 5.2\n\n**Row description:** Poisonous gas Zone A\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.3", "class_b": "5.2", "code": "X", "file": "carriage-by-public-highway-poisonous-gas-zone-a-5-2-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-gas-zone-a-5-2-2-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Poisonous gas Zone A", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 6.1 liquids PG I zone A\n\n**Row description:** Poisonous gas Zone A\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.3", "class_b": "6.1 liquids PG I zone A", "file": "carriage-by-public-highway-poisonous-gas-zone-a-6-1-liquids-pg-i-zone-a-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-gas-zone-a-6-1-liquids-pg-i-zone-a-2-3", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Poisonous gas Zone A", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 7\n\n**Row description:** Poisonous gas Zone A\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.3", "class_b": "7", "file": "carriage-by-public-highway-poisonous-gas-zone-a-7-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-gas-zone-a-7-2-3", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Poisonous gas Zone A", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 8 liquids only\n\n**Row description:** Poisonous gas Zone A\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.3", "class_b": "8 liquids only", "code": "X", "file": "carriage-by-public-highway-poisonous-gas-zone-a-8-liquids-only-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-gas-zone-a-8-liquids-only-2-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Poisonous gas Zone A", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 1.1 1.2\n\n**Row description:** Poisonous gas Zone B\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.3", "class_b": "1.1 1.2", "code": "X", "file": "carriage-by-public-highway-poisonous-gas-zone-b-1-1-1-2-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-gas-zone-b-1-1-1-2-2-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Poisonous gas Zone B", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 1.3\n\n**Row description:** Poisonous gas Zone B\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.3", "class_b": "1.3", "code": "X", "file": "carriage-by-public-highway-poisonous-gas-zone-b-1-3-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-gas-zone-b-1-3-2-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Poisonous gas Zone B", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 1.4\n\n**Row description:** Poisonous gas Zone B\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.3", "class_b": "1.4", "code": "O", "file": "carriage-by-public-highway-poisonous-gas-zone-b-1-4-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-gas-zone-b-1-4-2-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Poisonous gas Zone B", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 1.5\n\n**Row description:** Poisonous gas Zone B\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.3", "class_b": "1.5", "code": "X", "file": "carriage-by-public-highway-poisonous-gas-zone-b-1-5-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-gas-zone-b-1-5-2-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Poisonous gas Zone B", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 1.6\n\n**Row description:** Poisonous gas Zone B\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.3", "class_b": "1.6", "file": "carriage-by-public-highway-poisonous-gas-zone-b-1-6-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-gas-zone-b-1-6-2-3", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Poisonous gas Zone B", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 2.1\n\n**Row description:** Poisonous gas Zone B\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.3", "class_b": "2.1", "code": "O", "file": "carriage-by-public-highway-poisonous-gas-zone-b-2-1-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-gas-zone-b-2-1-2-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Poisonous gas Zone B", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 2.2\n\n**Row description:** Poisonous gas Zone B\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.3", "class_b": "2.2", "file": "carriage-by-public-highway-poisonous-gas-zone-b-2-2-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-gas-zone-b-2-2-2-3", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Poisonous gas Zone B", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 2.3 gas zone A\n\n**Row description:** Poisonous gas Zone B\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.3", "class_b": "2.3 gas zone A", "file": "carriage-by-public-highway-poisonous-gas-zone-b-2-3-gas-zone-a-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-gas-zone-b-2-3-gas-zone-a-2-3", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Poisonous gas Zone B", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 2.3 gas Zone B\n\n**Row description:** Poisonous gas Zone B\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.3", "class_b": "2.3 gas Zone B", "file": "carriage-by-public-highway-poisonous-gas-zone-b-2-3-gas-zone-b-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-gas-zone-b-2-3-gas-zone-b-2-3", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Poisonous gas Zone B", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 3\n\n**Row description:** Poisonous gas Zone B\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.3", "class_b": "3", "code": "O", "file": "carriage-by-public-highway-poisonous-gas-zone-b-3-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-gas-zone-b-3-2-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Poisonous gas Zone B", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 4.1\n\n**Row description:** Poisonous gas Zone B\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.3", "class_b": "4.1", "code": "O", "file": "carriage-by-public-highway-poisonous-gas-zone-b-4-1-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-gas-zone-b-4-1-2-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Poisonous gas Zone B", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 4.2\n\n**Row description:** Poisonous gas Zone B\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.3", "class_b": "4.2", "code": "O", "file": "carriage-by-public-highway-poisonous-gas-zone-b-4-2-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-gas-zone-b-4-2-2-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Poisonous gas Zone B", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 4.3\n\n**Row description:** Poisonous gas Zone B\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.3", "class_b": "4.3", "code": "O", "file": "carriage-by-public-highway-poisonous-gas-zone-b-4-3-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-gas-zone-b-4-3-2-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Poisonous gas Zone B", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 5.1\n\n**Row description:** Poisonous gas Zone B\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.3", "class_b": "5.1", "code": "O", "file": "carriage-by-public-highway-poisonous-gas-zone-b-5-1-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-gas-zone-b-5-1-2-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Poisonous gas Zone B", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 5.2\n\n**Row description:** Poisonous gas Zone B\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.3", "class_b": "5.2", "code": "O", "file": "carriage-by-public-highway-poisonous-gas-zone-b-5-2-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-gas-zone-b-5-2-2-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Poisonous gas Zone B", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 6.1 liquids PG I zone A\n\n**Row description:** Poisonous gas Zone B\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.3", "class_b": "6.1 liquids PG I zone A", "file": "carriage-by-public-highway-poisonous-gas-zone-b-6-1-liquids-pg-i-zone-a-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-gas-zone-b-6-1-liquids-pg-i-zone-a-2-3", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Poisonous gas Zone B", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 7\n\n**Row description:** Poisonous gas Zone B\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.3", "class_b": "7", "file": "carriage-by-public-highway-poisonous-gas-zone-b-7-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-gas-zone-b-7-2-3", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Poisonous gas Zone B", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 8 liquids only\n\n**Row description:** Poisonous gas Zone B\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "2.3", "class_b": "8 liquids only", "code": "O", "file": "carriage-by-public-highway-poisonous-gas-zone-b-8-liquids-only-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-gas-zone-b-8-liquids-only-2-3", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Poisonous gas Zone B", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.1\n\n**Second hazard class (table column):** 1.1 1.2\n\n**Row description:** Poisonous liquids PG I Zone A\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "6.1", "class_b": "1.1 1.2", "code": "X", "file": "carriage-by-public-highway-poisonous-liquids-pg-i-zone-a-1-1-1-2-6-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-liquids-pg-i-zone-a-1-1-1-2-6-1", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Poisonous liquids PG I Zone A", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "6.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.1\n\n**Second hazard class (table column):** 1.3\n\n**Row description:** Poisonous liquids PG I Zone A\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "6.1", "class_b": "1.3", "code": "X", "file": "carriage-by-public-highway-poisonous-liquids-pg-i-zone-a-1-3-6-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-liquids-pg-i-zone-a-1-3-6-1", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Poisonous liquids PG I Zone A", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "6.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.1\n\n**Second hazard class (table column):** 1.4\n\n**Row description:** Poisonous liquids PG I Zone A\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "6.1", "class_b": "1.4", "code": "O", "file": "carriage-by-public-highway-poisonous-liquids-pg-i-zone-a-1-4-6-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-liquids-pg-i-zone-a-1-4-6-1", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Poisonous liquids PG I Zone A", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "6.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.1\n\n**Second hazard class (table column):** 1.5\n\n**Row description:** Poisonous liquids PG I Zone A\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "6.1", "class_b": "1.5", "code": "X", "file": "carriage-by-public-highway-poisonous-liquids-pg-i-zone-a-1-5-6-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-liquids-pg-i-zone-a-1-5-6-1", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Poisonous liquids PG I Zone A", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "6.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.1\n\n**Second hazard class (table column):** 1.6\n\n**Row description:** Poisonous liquids PG I Zone A\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "6.1", "class_b": "1.6", "file": "carriage-by-public-highway-poisonous-liquids-pg-i-zone-a-1-6-6-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-liquids-pg-i-zone-a-1-6-6-1", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Poisonous liquids PG I Zone A", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "6.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.1\n\n**Second hazard class (table column):** 2.1\n\n**Row description:** Poisonous liquids PG I Zone A\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "6.1", "class_b": "2.1", "code": "O", "file": "carriage-by-public-highway-poisonous-liquids-pg-i-zone-a-2-1-6-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-liquids-pg-i-zone-a-2-1-6-1", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Poisonous liquids PG I Zone A", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "6.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.1\n\n**Second hazard class (table column):** 2.2\n\n**Row description:** Poisonous liquids PG I Zone A\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "6.1", "class_b": "2.2", "file": "carriage-by-public-highway-poisonous-liquids-pg-i-zone-a-2-2-6-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-liquids-pg-i-zone-a-2-2-6-1", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Poisonous liquids PG I Zone A", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "6.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.1\n\n**Second hazard class (table column):** 2.3 gas zone A\n\n**Row description:** Poisonous liquids PG I Zone A\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "6.1", "class_b": "2.3 gas zone A", "file": "carriage-by-public-highway-poisonous-liquids-pg-i-zone-a-2-3-gas-zone-a-6-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-liquids-pg-i-zone-a-2-3-gas-zone-a-6-1", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Poisonous liquids PG I Zone A", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "6.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.1\n\n**Second hazard class (table column):** 2.3 gas Zone B\n\n**Row description:** Poisonous liquids PG I Zone A\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "6.1", "class_b": "2.3 gas Zone B", "file": "carriage-by-public-highway-poisonous-liquids-pg-i-zone-a-2-3-gas-zone-b-6-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-liquids-pg-i-zone-a-2-3-gas-zone-b-6-1", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Poisonous liquids PG I Zone A", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "6.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.1\n\n**Second hazard class (table column):** 3\n\n**Row description:** Poisonous liquids PG I Zone A\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "6.1", "class_b": "3", "code": "X", "file": "carriage-by-public-highway-poisonous-liquids-pg-i-zone-a-3-6-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-liquids-pg-i-zone-a-3-6-1", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Poisonous liquids PG I Zone A", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "6.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.1\n\n**Second hazard class (table column):** 4.1\n\n**Row description:** Poisonous liquids PG I Zone A\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "6.1", "class_b": "4.1", "code": "X", "file": "carriage-by-public-highway-poisonous-liquids-pg-i-zone-a-4-1-6-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-liquids-pg-i-zone-a-4-1-6-1", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Poisonous liquids PG I Zone A", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "6.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.1\n\n**Second hazard class (table column):** 4.2\n\n**Row description:** Poisonous liquids PG I Zone A\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "6.1", "class_b": "4.2", "code": "X", "file": "carriage-by-public-highway-poisonous-liquids-pg-i-zone-a-4-2-6-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-liquids-pg-i-zone-a-4-2-6-1", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Poisonous liquids PG I Zone A", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "6.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.1\n\n**Second hazard class (table column):** 4.3\n\n**Row description:** Poisonous liquids PG I Zone A\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "6.1", "class_b": "4.3", "code": "X", "file": "carriage-by-public-highway-poisonous-liquids-pg-i-zone-a-4-3-6-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-liquids-pg-i-zone-a-4-3-6-1", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Poisonous liquids PG I Zone A", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "6.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.1\n\n**Second hazard class (table column):** 5.1\n\n**Row description:** Poisonous liquids PG I Zone A\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "6.1", "class_b": "5.1", "code": "X", "file": "carriage-by-public-highway-poisonous-liquids-pg-i-zone-a-5-1-6-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-liquids-pg-i-zone-a-5-1-6-1", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Poisonous liquids PG I Zone A", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "6.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.1\n\n**Second hazard class (table column):** 5.2\n\n**Row description:** Poisonous liquids PG I Zone A\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "6.1", "class_b": "5.2", "code": "X", "file": "carriage-by-public-highway-poisonous-liquids-pg-i-zone-a-5-2-6-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-liquids-pg-i-zone-a-5-2-6-1", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Poisonous liquids PG I Zone A", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "6.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.1\n\n**Second hazard class (table column):** 6.1 liquids PG I zone A\n\n**Row description:** Poisonous liquids PG I Zone A\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "6.1", "class_b": "6.1 liquids PG I zone A", "file": "carriage-by-public-highway-poisonous-liquids-pg-i-zone-a-6-1-liquids-pg-i-zone-a-6-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-liquids-pg-i-zone-a-6-1-liquids-pg-i-zone-a-6-1", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Poisonous liquids PG I Zone A", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "6.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.1\n\n**Second hazard class (table column):** 7\n\n**Row description:** Poisonous liquids PG I Zone A\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "6.1", "class_b": "7", "file": "carriage-by-public-highway-poisonous-liquids-pg-i-zone-a-7-6-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-liquids-pg-i-zone-a-7-6-1", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Poisonous liquids PG I Zone A", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "6.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.1\n\n**Second hazard class (table column):** 8 liquids only\n\n**Row description:** Poisonous liquids PG I Zone A\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "6.1", "class_b": "8 liquids only", "code": "X", "file": "carriage-by-public-highway-poisonous-liquids-pg-i-zone-a-8-liquids-only-6-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-poisonous-liquids-pg-i-zone-a-8-liquids-only-6-1", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Poisonous liquids PG I Zone A", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "6.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 7\n\n**Second hazard class (table column):** 1.1 1.2\n\n**Row description:** Radioactive materials\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "7", "class_b": "1.1 1.2", "code": "X", "file": "carriage-by-public-highway-radioactive-materials-1-1-1-2-7.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-radioactive-materials-1-1-1-2-7", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Radioactive materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "7 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 7\n\n**Second hazard class (table column):** 1.3\n\n**Row description:** Radioactive materials\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "7", "class_b": "1.3", "file": "carriage-by-public-highway-radioactive-materials-1-3-7.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-radioactive-materials-1-3-7", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Radioactive materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "7 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 7\n\n**Second hazard class (table column):** 1.4\n\n**Row description:** Radioactive materials\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "7", "class_b": "1.4", "file": "carriage-by-public-highway-radioactive-materials-1-4-7.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-radioactive-materials-1-4-7", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Radioactive materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "7 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 7\n\n**Second hazard class (table column):** 1.5\n\n**Row description:** Radioactive materials\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "7", "class_b": "1.5", "code": "X", "file": "carriage-by-public-highway-radioactive-materials-1-5-7.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-radioactive-materials-1-5-7", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Radioactive materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "7 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 7\n\n**Second hazard class (table column):** 1.6\n\n**Row description:** Radioactive materials\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "7", "class_b": "1.6", "file": "carriage-by-public-highway-radioactive-materials-1-6-7.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-radioactive-materials-1-6-7", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Radioactive materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "7 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 7\n\n**Second hazard class (table column):** 2.1\n\n**Row description:** Radioactive materials\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "7", "class_b": "2.1", "code": "O", "file": "carriage-by-public-highway-radioactive-materials-2-1-7.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-radioactive-materials-2-1-7", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Radioactive materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "7 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 7\n\n**Second hazard class (table column):** 2.2\n\n**Row description:** Radioactive materials\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "7", "class_b": "2.2", "file": "carriage-by-public-highway-radioactive-materials-2-2-7.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-radioactive-materials-2-2-7", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Radioactive materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "7 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 7\n\n**Second hazard class (table column):** 2.3 gas zone A\n\n**Row description:** Radioactive materials\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "7", "class_b": "2.3 gas zone A", "file": "carriage-by-public-highway-radioactive-materials-2-3-gas-zone-a-7.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-radioactive-materials-2-3-gas-zone-a-7", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Radioactive materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "7 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 7\n\n**Second hazard class (table column):** 2.3 gas Zone B\n\n**Row description:** Radioactive materials\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "7", "class_b": "2.3 gas Zone B", "file": "carriage-by-public-highway-radioactive-materials-2-3-gas-zone-b-7.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-radioactive-materials-2-3-gas-zone-b-7", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Radioactive materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "7 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 7\n\n**Second hazard class (table column):** 3\n\n**Row description:** Radioactive materials\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "7", "class_b": "3", "file": "carriage-by-public-highway-radioactive-materials-3-7.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-radioactive-materials-3-7", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Radioactive materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "7 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 7\n\n**Second hazard class (table column):** 4.1\n\n**Row description:** Radioactive materials\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "7", "class_b": "4.1", "file": "carriage-by-public-highway-radioactive-materials-4-1-7.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-radioactive-materials-4-1-7", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Radioactive materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "7 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 7\n\n**Second hazard class (table column):** 4.2\n\n**Row description:** Radioactive materials\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "7", "class_b": "4.2", "file": "carriage-by-public-highway-radioactive-materials-4-2-7.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-radioactive-materials-4-2-7", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Radioactive materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "7 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 7\n\n**Second hazard class (table column):** 4.3\n\n**Row description:** Radioactive materials\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "7", "class_b": "4.3", "file": "carriage-by-public-highway-radioactive-materials-4-3-7.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-radioactive-materials-4-3-7", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Radioactive materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "7 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 7\n\n**Second hazard class (table column):** 5.1\n\n**Row description:** Radioactive materials\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "7", "class_b": "5.1", "file": "carriage-by-public-highway-radioactive-materials-5-1-7.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-radioactive-materials-5-1-7", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Radioactive materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "7 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 7\n\n**Second hazard class (table column):** 5.2\n\n**Row description:** Radioactive materials\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "7", "class_b": "5.2", "file": "carriage-by-public-highway-radioactive-materials-5-2-7.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-radioactive-materials-5-2-7", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Radioactive materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "7 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 7\n\n**Second hazard class (table column):** 6.1 liquids PG I zone A\n\n**Row description:** Radioactive materials\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "7", "class_b": "6.1 liquids PG I zone A", "file": "carriage-by-public-highway-radioactive-materials-6-1-liquids-pg-i-zone-a-7.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-radioactive-materials-6-1-liquids-pg-i-zone-a-7", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Radioactive materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "7 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 7\n\n**Second hazard class (table column):** 7\n\n**Row description:** Radioactive materials\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "7", "class_b": "7", "file": "carriage-by-public-highway-radioactive-materials-7-7.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-radioactive-materials-7-7", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Radioactive materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "7 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 7\n\n**Second hazard class (table column):** 8 liquids only\n\n**Row description:** Radioactive materials\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "7", "class_b": "8 liquids only", "file": "carriage-by-public-highway-radioactive-materials-8-liquids-only-7.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-radioactive-materials-8-liquids-only-7", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Radioactive materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "7 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.2\n\n**Second hazard class (table column):** 1.1 1.2\n\n**Row description:** Spontaneously combustible materials\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.2", "class_b": "1.1 1.2", "code": "X", "file": "carriage-by-public-highway-spontaneously-combustible-materials-1-1-1-2-4-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-spontaneously-combustible-materials-1-1-1-2-4-2", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Spontaneously combustible materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.2\n\n**Second hazard class (table column):** 1.3\n\n**Row description:** Spontaneously combustible materials\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.2", "class_b": "1.3", "code": "X", "file": "carriage-by-public-highway-spontaneously-combustible-materials-1-3-4-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-spontaneously-combustible-materials-1-3-4-2", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Spontaneously combustible materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.2\n\n**Second hazard class (table column):** 1.4\n\n**Row description:** Spontaneously combustible materials\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.2", "class_b": "1.4", "code": "O", "file": "carriage-by-public-highway-spontaneously-combustible-materials-1-4-4-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-spontaneously-combustible-materials-1-4-4-2", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Spontaneously combustible materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.2\n\n**Second hazard class (table column):** 1.5\n\n**Row description:** Spontaneously combustible materials\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.2", "class_b": "1.5", "code": "X", "file": "carriage-by-public-highway-spontaneously-combustible-materials-1-5-4-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-spontaneously-combustible-materials-1-5-4-2", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Spontaneously combustible materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.2\n\n**Second hazard class (table column):** 1.6\n\n**Row description:** Spontaneously combustible materials\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.2", "class_b": "1.6", "file": "carriage-by-public-highway-spontaneously-combustible-materials-1-6-4-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-spontaneously-combustible-materials-1-6-4-2", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Spontaneously combustible materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.2\n\n**Second hazard class (table column):** 2.1\n\n**Row description:** Spontaneously combustible materials\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.2", "class_b": "2.1", "file": "carriage-by-public-highway-spontaneously-combustible-materials-2-1-4-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-spontaneously-combustible-materials-2-1-4-2", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Spontaneously combustible materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.2\n\n**Second hazard class (table column):** 2.2\n\n**Row description:** Spontaneously combustible materials\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.2", "class_b": "2.2", "file": "carriage-by-public-highway-spontaneously-combustible-materials-2-2-4-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-spontaneously-combustible-materials-2-2-4-2", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Spontaneously combustible materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.2\n\n**Second hazard class (table column):** 2.3 gas zone A\n\n**Row description:** Spontaneously combustible materials\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.2", "class_b": "2.3 gas zone A", "code": "X", "file": "carriage-by-public-highway-spontaneously-combustible-materials-2-3-gas-zone-a-4-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-spontaneously-combustible-materials-2-3-gas-zone-a-4-2", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Spontaneously combustible materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.2\n\n**Second hazard class (table column):** 2.3 gas Zone B\n\n**Row description:** Spontaneously combustible materials\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** O\n\n**What the code requires:** The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.2", "class_b": "2.3 gas Zone B", "code": "O", "file": "carriage-by-public-highway-spontaneously-combustible-materials-2-3-gas-zone-b-4-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-spontaneously-combustible-materials-2-3-gas-zone-b-4-2", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.", "row_name": "Spontaneously combustible materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.2\n\n**Second hazard class (table column):** 3\n\n**Row description:** Spontaneously combustible materials\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.2", "class_b": "3", "file": "carriage-by-public-highway-spontaneously-combustible-materials-3-4-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-spontaneously-combustible-materials-3-4-2", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Spontaneously combustible materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.2\n\n**Second hazard class (table column):** 4.1\n\n**Row description:** Spontaneously combustible materials\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.2", "class_b": "4.1", "file": "carriage-by-public-highway-spontaneously-combustible-materials-4-1-4-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-spontaneously-combustible-materials-4-1-4-2", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Spontaneously combustible materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.2\n\n**Second hazard class (table column):** 4.2\n\n**Row description:** Spontaneously combustible materials\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.2", "class_b": "4.2", "file": "carriage-by-public-highway-spontaneously-combustible-materials-4-2-4-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-spontaneously-combustible-materials-4-2-4-2", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Spontaneously combustible materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.2\n\n**Second hazard class (table column):** 4.3\n\n**Row description:** Spontaneously combustible materials\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.2", "class_b": "4.3", "file": "carriage-by-public-highway-spontaneously-combustible-materials-4-3-4-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-spontaneously-combustible-materials-4-3-4-2", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Spontaneously combustible materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.2\n\n**Second hazard class (table column):** 5.1\n\n**Row description:** Spontaneously combustible materials\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.2", "class_b": "5.1", "file": "carriage-by-public-highway-spontaneously-combustible-materials-5-1-4-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-spontaneously-combustible-materials-5-1-4-2", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Spontaneously combustible materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.2\n\n**Second hazard class (table column):** 5.2\n\n**Row description:** Spontaneously combustible materials\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.2", "class_b": "5.2", "file": "carriage-by-public-highway-spontaneously-combustible-materials-5-2-4-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-spontaneously-combustible-materials-5-2-4-2", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Spontaneously combustible materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.2\n\n**Second hazard class (table column):** 6.1 liquids PG I zone A\n\n**Row description:** Spontaneously combustible materials\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.2", "class_b": "6.1 liquids PG I zone A", "code": "X", "file": "carriage-by-public-highway-spontaneously-combustible-materials-6-1-liquids-pg-i-zone-a-4-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-spontaneously-combustible-materials-6-1-liquids-pg-i-zone-a-4-2", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Spontaneously combustible materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.2\n\n**Second hazard class (table column):** 7\n\n**Row description:** Spontaneously combustible materials\n\n**Transport mode:** Carriage by Public Highway\n\n**What the code requires:** The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.2", "class_b": "7", "file": "carriage-by-public-highway-spontaneously-combustible-materials-7-4-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-spontaneously-combustible-materials-7-4-2", "mode": "Carriage by Public Highway", "requirement": "The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply.", "row_name": "Spontaneously combustible materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.2\n\n**Second hazard class (table column):** 8 liquids only\n\n**Row description:** Spontaneously combustible materials\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "4.2", "class_b": "8 liquids only", "code": "X", "file": "carriage-by-public-highway-spontaneously-combustible-materials-8-liquids-only-4-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-spontaneously-combustible-materials-8-liquids-only-4-2", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Spontaneously combustible materials", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "4.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.5\n\n**Second hazard class (table column):** 1.1 1.2\n\n**Row description:** Very insensitive explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** *\n\n**What the code requires:** The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.5", "class_b": "1.1 1.2", "code": "*", "file": "carriage-by-public-highway-very-insensitive-explosives-1-1-1-2-1-5.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-very-insensitive-explosives-1-1-1-2-1-5", "mode": "Carriage by Public Highway", "requirement": "The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.", "row_name": "Very insensitive explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.5 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.5\n\n**Second hazard class (table column):** 1.3\n\n**Row description:** Very insensitive explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** *\n\n**What the code requires:** The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.5", "class_b": "1.3", "code": "*", "file": "carriage-by-public-highway-very-insensitive-explosives-1-3-1-5.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-very-insensitive-explosives-1-3-1-5", "mode": "Carriage by Public Highway", "requirement": "The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.", "row_name": "Very insensitive explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.5 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.5\n\n**Second hazard class (table column):** 1.4\n\n**Row description:** Very insensitive explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** *\n\n**What the code requires:** The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.5", "class_b": "1.4", "code": "*", "file": "carriage-by-public-highway-very-insensitive-explosives-1-4-1-5.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-very-insensitive-explosives-1-4-1-5", "mode": "Carriage by Public Highway", "requirement": "The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.", "row_name": "Very insensitive explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.5 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.5\n\n**Second hazard class (table column):** 1.5\n\n**Row description:** Very insensitive explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** *\n\n**What the code requires:** The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.5", "class_b": "1.5", "code": "*", "file": "carriage-by-public-highway-very-insensitive-explosives-1-5-1-5.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-very-insensitive-explosives-1-5-1-5", "mode": "Carriage by Public Highway", "requirement": "The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.", "row_name": "Very insensitive explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.5 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.5\n\n**Second hazard class (table column):** 1.6\n\n**Row description:** Very insensitive explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** *\n\n**What the code requires:** The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.5", "class_b": "1.6", "code": "*", "file": "carriage-by-public-highway-very-insensitive-explosives-1-6-1-5.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-very-insensitive-explosives-1-6-1-5", "mode": "Carriage by Public Highway", "requirement": "The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section.", "row_name": "Very insensitive explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.5 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.5\n\n**Second hazard class (table column):** 2.1\n\n**Row description:** Very insensitive explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.5", "class_b": "2.1", "code": "X", "file": "carriage-by-public-highway-very-insensitive-explosives-2-1-1-5.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-very-insensitive-explosives-2-1-1-5", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Very insensitive explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.5 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.5\n\n**Second hazard class (table column):** 2.2\n\n**Row description:** Very insensitive explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.5", "class_b": "2.2", "code": "X", "file": "carriage-by-public-highway-very-insensitive-explosives-2-2-1-5.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-very-insensitive-explosives-2-2-1-5", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Very insensitive explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.5 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.5\n\n**Second hazard class (table column):** 2.3 gas zone A\n\n**Row description:** Very insensitive explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.5", "class_b": "2.3 gas zone A", "code": "X", "file": "carriage-by-public-highway-very-insensitive-explosives-2-3-gas-zone-a-1-5.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-very-insensitive-explosives-2-3-gas-zone-a-1-5", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Very insensitive explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.5 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.5\n\n**Second hazard class (table column):** 2.3 gas Zone B\n\n**Row description:** Very insensitive explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.5", "class_b": "2.3 gas Zone B", "code": "X", "file": "carriage-by-public-highway-very-insensitive-explosives-2-3-gas-zone-b-1-5.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-very-insensitive-explosives-2-3-gas-zone-b-1-5", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Very insensitive explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.5 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.5\n\n**Second hazard class (table column):** 3\n\n**Row description:** Very insensitive explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.5", "class_b": "3", "code": "X", "file": "carriage-by-public-highway-very-insensitive-explosives-3-1-5.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-very-insensitive-explosives-3-1-5", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Very insensitive explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.5 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.5\n\n**Second hazard class (table column):** 4.1\n\n**Row description:** Very insensitive explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.5", "class_b": "4.1", "code": "X", "file": "carriage-by-public-highway-very-insensitive-explosives-4-1-1-5.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-very-insensitive-explosives-4-1-1-5", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Very insensitive explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.5 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.5\n\n**Second hazard class (table column):** 4.2\n\n**Row description:** Very insensitive explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.5", "class_b": "4.2", "code": "X", "file": "carriage-by-public-highway-very-insensitive-explosives-4-2-1-5.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-very-insensitive-explosives-4-2-1-5", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Very insensitive explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.5 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.5\n\n**Second hazard class (table column):** 4.3\n\n**Row description:** Very insensitive explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.5", "class_b": "4.3", "code": "X", "file": "carriage-by-public-highway-very-insensitive-explosives-4-3-1-5.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-very-insensitive-explosives-4-3-1-5", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Very insensitive explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.5 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.5\n\n**Second hazard class (table column):** 5.1\n\n**Row description:** Very insensitive explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.5", "class_b": "5.1", "code": "X", "file": "carriage-by-public-highway-very-insensitive-explosives-5-1-1-5.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-very-insensitive-explosives-5-1-1-5", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Very insensitive explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.5 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.5\n\n**Second hazard class (table column):** 5.2\n\n**Row description:** Very insensitive explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.5", "class_b": "5.2", "code": "X", "file": "carriage-by-public-highway-very-insensitive-explosives-5-2-1-5.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-very-insensitive-explosives-5-2-1-5", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Very insensitive explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.5 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.5\n\n**Second hazard class (table column):** 6.1 liquids PG I zone A\n\n**Row description:** Very insensitive explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.5", "class_b": "6.1 liquids PG I zone A", "code": "X", "file": "carriage-by-public-highway-very-insensitive-explosives-6-1-liquids-pg-i-zone-a-1-5.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-very-insensitive-explosives-6-1-liquids-pg-i-zone-a-1-5", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Very insensitive explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.5 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.5\n\n**Second hazard class (table column):** 7\n\n**Row description:** Very insensitive explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.5", "class_b": "7", "code": "X", "file": "carriage-by-public-highway-very-insensitive-explosives-7-1-5.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-very-insensitive-explosives-7-1-5", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Very insensitive explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.5 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.5\n\n**Second hazard class (table column):** 8 liquids only\n\n**Row description:** Very insensitive explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** X\n\n**What the code requires:** The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.5", "class_b": "8 liquids only", "code": "X", "file": "carriage-by-public-highway-very-insensitive-explosives-8-liquids-only-1-5.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-very-insensitive-explosives-8-liquids-only-1-5", "mode": "Carriage by Public Highway", "requirement": "The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation.", "row_name": "Very insensitive explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.5 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.5\n\n**Second hazard class (table column):** ammonium nitrate (UN1942)\n\n**Row description:** Very insensitive explosives\n\n**Transport mode:** Carriage by Public Highway\n\n**Segregation code:** A\n\n**What the code requires:** The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) .\n\n> Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.\n\nSource: \n", "class_a": "1.5", "class_b": "ammonium nitrate (UN1942)", "code": "A", "file": "carriage-by-public-highway-very-insensitive-explosives-ammonium-nitrate-un1942-1-5.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-public-highway-very-insensitive-explosives-ammonium-nitrate-un1942-1-5", "mode": "Carriage by Public Highway", "requirement": "The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) .", "row_name": "Very insensitive explosives", "source_quote": "Segregation Table for Hazardous Materials Class or division | | Notes | 1.1 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 2.1 | 2.2 | 2.3 gas zone A | 2.3 gas Zone B | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 liquids PG I zone A | 7 | 8 liquids only | Explosives | 1.1 and 1.2 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Explosives | 1.3 | | * | * | * | * | * | X | | X | X | X | | X | X | X | X | X | | X | Explosives | 1.4 | | * | * | * | * | * | O | | O | O | O | | O | | | | O | | O | Very insensitive explosives | 1.5 | A | * | * | * | * | * | X | X | X | X | X | X | X | X | X | X | X | X | X | Extremely insensitive explosives | 1.6 | | * | * | * | * | * | | | | | | | | | | | | | | Flammable gases | 2.1 | | X | X | O | X | | | | X | O | | | | | | | O | O | | Non-toxic, non-flammable gases | 2.2 | | X | | | X | | | | | | | | | | | | | | | Poisonous gas Zone A | 2.3 | | X | X | O | X | | X | | | | X | X | X | X | X | X | | | X | Poisonous gas Zone B | 2.3 | | X | X | O | X | | O | | | | O | O | O | O | O | O | | | O | Flammable liquids | 3 | | X | X | O | X | | | | X | O | | | | | O | | X | | | Flammable solids | 4.1 | | X | | | X | | | | X | O | | | | | | | X | | O | Spontaneously combustible materials | 4.2 | | X | X | O | X | | | | X | O | | | | | | | X | | X | Dangerous when wet materials | 4.3 | | X | X | | X | | | | X | O | | | | | | | X | | O | Oxidizers | 5.1 | A | X | X | | X | | | | X | O | O | | | | | | X | | O | Organic peroxides | 5.2 | | X | X | | X | | | | X | O | | | | | | | X | | O | Poisonous liquids PG I Zone A | 6.1 | | X | X | O | X | | O | | | | X | X | X | X | X | X | | | X | Radioactive materials | 7 | | X | | | X | | O | | | | | | | | | | | | | Corrosive liquids | 8 | | X | X | O | X | | | | X | O | | O | X | O | O | O | X | | | ( e ) lnstructions for using the segregation table for hazardous materials are as follows: ( 1 ) The absence of any hazard class or division or a blank space in the table indicates that no restrictions apply. ( 2 ) The letter \u201cX\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation. ( 3 ) The letter \u201cO\u201d in the table indicates that these materials may not be loaded, transported, or stored together in the same transport vehicle or storage facility during the course of transportation unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur. Notwithstanding the methods of separation employed, Class 8 (corrosive) liquids may not be loaded above or adjacent to Class 4 (flammable) or Class 5 (oxidizing) materials; except that shippers may load truckload shipments of such materials together when it is known that the mixture of contents would not cause a fire or a dangerous evolution of heat or gas. ( 4 ) The \u201c*\u201d in the table indicates that segregation among different Class 1 (explosive) materials is governed by the compatibility table in paragraph (f) of this section. ( 5 ) The note \u201cA\u201d in the second column of the table means that, notwithstanding the requirements of the letter \u201cX\u201d, ammonium nitrate (UN1942) and ammonium nitrate fertilizer may be loaded or stored with Division 1.1 (explosive) or Division 1.5 materials, unless otherwise prohibited by \u00a7 177.835(c) . ( 6 ) When the \u00a7 172.101 table or \u00a7 172.402 of this subchapter requires a package to bear a subsidiary hazard label, segregation appropriate to the subsidiary hazard must be applied when that segregation is more restrictive than that required by the primary hazard. However, hazardous materials of the same class may be stored together without regard to segregation required for any secondary hazard if the materials are not capable of reacting dangerously with each other and causing combustion or dangerous evolution of heat, evolution of flammable, poisonous, or asphyxiant gases, or formation of corrosive or unstable materials.", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-177/subpart-C/section-177.848"], "stale_after": "2027-08-10", "title": "1.5 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 8\n\n**Second hazard class (table column):** 1.1, 1.2, 1.5\n\n**Row description:** Corrosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 4\n\n**What the code requires:** 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "8", "class_b": "1.1, 1.2, 1.5", "code": "4", "file": "carriage-by-vessel-corrosives-1-1-1-2-1-5-8.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-corrosives-1-1-1-2-1-5-8", "mode": "Carriage by Vessel", "requirement": "4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d", "row_name": "Corrosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "8 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 8\n\n**Second hazard class (table column):** 1.3\n\n**Row description:** Corrosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "8", "class_b": "1.3", "code": "2", "file": "carriage-by-vessel-corrosives-1-3-8.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-corrosives-1-3-8", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Corrosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "8 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 8\n\n**Second hazard class (table column):** 1.4, 1.6\n\n**Row description:** Corrosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "8", "class_b": "1.4, 1.6", "code": "2", "file": "carriage-by-vessel-corrosives-1-4-1-6-8.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-corrosives-1-4-1-6-8", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Corrosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "8 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 8\n\n**Second hazard class (table column):** 2.1\n\n**Row description:** Corrosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "8", "class_b": "2.1", "code": "1", "file": "carriage-by-vessel-corrosives-2-1-8.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-corrosives-2-1-8", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Corrosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "8 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 8\n\n**Second hazard class (table column):** 2.2\n\n**Row description:** Corrosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "8", "class_b": "2.2", "code": "X", "file": "carriage-by-vessel-corrosives-2-2-8.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-corrosives-2-2-8", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Corrosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "8 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 8\n\n**Second hazard class (table column):** 2.3\n\n**Row description:** Corrosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "8", "class_b": "2.3", "code": "X", "file": "carriage-by-vessel-corrosives-2-3-8.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-corrosives-2-3-8", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Corrosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "8 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 8\n\n**Second hazard class (table column):** 3\n\n**Row description:** Corrosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "8", "class_b": "3", "code": "X", "file": "carriage-by-vessel-corrosives-3-8.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-corrosives-3-8", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Corrosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "8 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 8\n\n**Second hazard class (table column):** 4.1\n\n**Row description:** Corrosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "8", "class_b": "4.1", "code": "1", "file": "carriage-by-vessel-corrosives-4-1-8.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-corrosives-4-1-8", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Corrosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "8 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 8\n\n**Second hazard class (table column):** 4.2\n\n**Row description:** Corrosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "8", "class_b": "4.2", "code": "1", "file": "carriage-by-vessel-corrosives-4-2-8.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-corrosives-4-2-8", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Corrosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "8 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 8\n\n**Second hazard class (table column):** 4.3\n\n**Row description:** Corrosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "8", "class_b": "4.3", "code": "1", "file": "carriage-by-vessel-corrosives-4-3-8.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-corrosives-4-3-8", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Corrosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "8 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 8\n\n**Second hazard class (table column):** 5.1\n\n**Row description:** Corrosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "8", "class_b": "5.1", "code": "2", "file": "carriage-by-vessel-corrosives-5-1-8.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-corrosives-5-1-8", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Corrosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "8 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 8\n\n**Second hazard class (table column):** 5.2\n\n**Row description:** Corrosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "8", "class_b": "5.2", "code": "2", "file": "carriage-by-vessel-corrosives-5-2-8.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-corrosives-5-2-8", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Corrosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "8 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 8\n\n**Second hazard class (table column):** 6.1\n\n**Row description:** Corrosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "8", "class_b": "6.1", "code": "X", "file": "carriage-by-vessel-corrosives-6-1-8.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-corrosives-6-1-8", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Corrosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "8 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 8\n\n**Second hazard class (table column):** 6.2\n\n**Row description:** Corrosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 3\n\n**What the code requires:** 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "8", "class_b": "6.2", "code": "3", "file": "carriage-by-vessel-corrosives-6-2-8.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-corrosives-6-2-8", "mode": "Carriage by Vessel", "requirement": "3\u2014\u201cSeparated by a complete compartment or hold from.\u201d", "row_name": "Corrosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "8 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 8\n\n**Second hazard class (table column):** 7\n\n**Row description:** Corrosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "8", "class_b": "7", "code": "2", "file": "carriage-by-vessel-corrosives-7-8.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-corrosives-7-8", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Corrosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "8 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 8\n\n**Second hazard class (table column):** 8\n\n**Row description:** Corrosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "8", "class_b": "8", "code": "X", "file": "carriage-by-vessel-corrosives-8-8.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-corrosives-8-8", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Corrosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "8 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 8\n\n**Second hazard class (table column):** 9\n\n**Row description:** Corrosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "8", "class_b": "9", "code": "X", "file": "carriage-by-vessel-corrosives-9-8.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-corrosives-9-8", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Corrosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "8 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.1, 1.2, 1.5\n\n**Second hazard class (table column):** 1.1, 1.2, 1.5\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** (*)\n\n**What the code requires:** *\u2014See \u00a7 176.144 of this part for segregation within Class 1.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.1, 1.2, 1.5", "class_b": "1.1, 1.2, 1.5", "code": "(*)", "file": "carriage-by-vessel-explosives-1-1-1-2-1-5-1-1-1-2-1-5.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-1-1-1-2-1-5-1-1-1-2-1-5", "mode": "Carriage by Vessel", "requirement": "*\u2014See \u00a7 176.144 of this part for segregation within Class 1.", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.1, 1.2, 1.5 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.3\n\n**Second hazard class (table column):** 1.1, 1.2, 1.5\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** (*)\n\n**What the code requires:** *\u2014See \u00a7 176.144 of this part for segregation within Class 1.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.3", "class_b": "1.1, 1.2, 1.5", "code": "(*)", "file": "carriage-by-vessel-explosives-1-1-1-2-1-5-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-1-1-1-2-1-5-1-3", "mode": "Carriage by Vessel", "requirement": "*\u2014See \u00a7 176.144 of this part for segregation within Class 1.", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.4, 1.6\n\n**Second hazard class (table column):** 1.1, 1.2, 1.5\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** (*)\n\n**What the code requires:** *\u2014See \u00a7 176.144 of this part for segregation within Class 1.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.4, 1.6", "class_b": "1.1, 1.2, 1.5", "code": "(*)", "file": "carriage-by-vessel-explosives-1-1-1-2-1-5-1-4-1-6.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-1-1-1-2-1-5-1-4-1-6", "mode": "Carriage by Vessel", "requirement": "*\u2014See \u00a7 176.144 of this part for segregation within Class 1.", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.4, 1.6 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.1, 1.2, 1.5\n\n**Second hazard class (table column):** 1.3\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** (*)\n\n**What the code requires:** *\u2014See \u00a7 176.144 of this part for segregation within Class 1.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.1, 1.2, 1.5", "class_b": "1.3", "code": "(*)", "file": "carriage-by-vessel-explosives-1-3-1-1-1-2-1-5.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-1-3-1-1-1-2-1-5", "mode": "Carriage by Vessel", "requirement": "*\u2014See \u00a7 176.144 of this part for segregation within Class 1.", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.1, 1.2, 1.5 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.3\n\n**Second hazard class (table column):** 1.3\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** (*)\n\n**What the code requires:** *\u2014See \u00a7 176.144 of this part for segregation within Class 1.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.3", "class_b": "1.3", "code": "(*)", "file": "carriage-by-vessel-explosives-1-3-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-1-3-1-3", "mode": "Carriage by Vessel", "requirement": "*\u2014See \u00a7 176.144 of this part for segregation within Class 1.", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.4, 1.6\n\n**Second hazard class (table column):** 1.3\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** (*)\n\n**What the code requires:** *\u2014See \u00a7 176.144 of this part for segregation within Class 1.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.4, 1.6", "class_b": "1.3", "code": "(*)", "file": "carriage-by-vessel-explosives-1-3-1-4-1-6.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-1-3-1-4-1-6", "mode": "Carriage by Vessel", "requirement": "*\u2014See \u00a7 176.144 of this part for segregation within Class 1.", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.4, 1.6 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.1, 1.2, 1.5\n\n**Second hazard class (table column):** 1.4, 1.6\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** (*)\n\n**What the code requires:** *\u2014See \u00a7 176.144 of this part for segregation within Class 1.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.1, 1.2, 1.5", "class_b": "1.4, 1.6", "code": "(*)", "file": "carriage-by-vessel-explosives-1-4-1-6-1-1-1-2-1-5.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-1-4-1-6-1-1-1-2-1-5", "mode": "Carriage by Vessel", "requirement": "*\u2014See \u00a7 176.144 of this part for segregation within Class 1.", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.1, 1.2, 1.5 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.3\n\n**Second hazard class (table column):** 1.4, 1.6\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** (*)\n\n**What the code requires:** *\u2014See \u00a7 176.144 of this part for segregation within Class 1.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.3", "class_b": "1.4, 1.6", "code": "(*)", "file": "carriage-by-vessel-explosives-1-4-1-6-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-1-4-1-6-1-3", "mode": "Carriage by Vessel", "requirement": "*\u2014See \u00a7 176.144 of this part for segregation within Class 1.", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.4, 1.6\n\n**Second hazard class (table column):** 1.4, 1.6\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** (*)\n\n**What the code requires:** *\u2014See \u00a7 176.144 of this part for segregation within Class 1.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.4, 1.6", "class_b": "1.4, 1.6", "code": "(*)", "file": "carriage-by-vessel-explosives-1-4-1-6-1-4-1-6.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-1-4-1-6-1-4-1-6", "mode": "Carriage by Vessel", "requirement": "*\u2014See \u00a7 176.144 of this part for segregation within Class 1.", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.4, 1.6 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.1, 1.2, 1.5\n\n**Second hazard class (table column):** 2.1\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 4\n\n**What the code requires:** 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.1, 1.2, 1.5", "class_b": "2.1", "code": "4", "file": "carriage-by-vessel-explosives-2-1-1-1-1-2-1-5.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-2-1-1-1-1-2-1-5", "mode": "Carriage by Vessel", "requirement": "4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.1, 1.2, 1.5 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.3\n\n**Second hazard class (table column):** 2.1\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 4\n\n**What the code requires:** 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.3", "class_b": "2.1", "code": "4", "file": "carriage-by-vessel-explosives-2-1-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-2-1-1-3", "mode": "Carriage by Vessel", "requirement": "4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.4, 1.6\n\n**Second hazard class (table column):** 2.1\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.4, 1.6", "class_b": "2.1", "code": "2", "file": "carriage-by-vessel-explosives-2-1-1-4-1-6.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-2-1-1-4-1-6", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.4, 1.6 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.1, 1.2, 1.5\n\n**Second hazard class (table column):** 2.2\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.1, 1.2, 1.5", "class_b": "2.2", "code": "2", "file": "carriage-by-vessel-explosives-2-2-1-1-1-2-1-5.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-2-2-1-1-1-2-1-5", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.1, 1.2, 1.5 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.3\n\n**Second hazard class (table column):** 2.2\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.3", "class_b": "2.2", "code": "2", "file": "carriage-by-vessel-explosives-2-2-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-2-2-1-3", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.4, 1.6\n\n**Second hazard class (table column):** 2.2\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.4, 1.6", "class_b": "2.2", "code": "1", "file": "carriage-by-vessel-explosives-2-2-1-4-1-6.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-2-2-1-4-1-6", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.4, 1.6 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.1, 1.2, 1.5\n\n**Second hazard class (table column):** 2.3\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.1, 1.2, 1.5", "class_b": "2.3", "code": "2", "file": "carriage-by-vessel-explosives-2-3-1-1-1-2-1-5.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-2-3-1-1-1-2-1-5", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.1, 1.2, 1.5 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.3\n\n**Second hazard class (table column):** 2.3\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.3", "class_b": "2.3", "code": "2", "file": "carriage-by-vessel-explosives-2-3-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-2-3-1-3", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.4, 1.6\n\n**Second hazard class (table column):** 2.3\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.4, 1.6", "class_b": "2.3", "code": "1", "file": "carriage-by-vessel-explosives-2-3-1-4-1-6.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-2-3-1-4-1-6", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.4, 1.6 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.1, 1.2, 1.5\n\n**Second hazard class (table column):** 3\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 4\n\n**What the code requires:** 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.1, 1.2, 1.5", "class_b": "3", "code": "4", "file": "carriage-by-vessel-explosives-3-1-1-1-2-1-5.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-3-1-1-1-2-1-5", "mode": "Carriage by Vessel", "requirement": "4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.1, 1.2, 1.5 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.3\n\n**Second hazard class (table column):** 3\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 4\n\n**What the code requires:** 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.3", "class_b": "3", "code": "4", "file": "carriage-by-vessel-explosives-3-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-3-1-3", "mode": "Carriage by Vessel", "requirement": "4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.4, 1.6\n\n**Second hazard class (table column):** 3\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.4, 1.6", "class_b": "3", "code": "2", "file": "carriage-by-vessel-explosives-3-1-4-1-6.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-3-1-4-1-6", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.4, 1.6 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.1, 1.2, 1.5\n\n**Second hazard class (table column):** 4.1\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 4\n\n**What the code requires:** 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.1, 1.2, 1.5", "class_b": "4.1", "code": "4", "file": "carriage-by-vessel-explosives-4-1-1-1-1-2-1-5.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-4-1-1-1-1-2-1-5", "mode": "Carriage by Vessel", "requirement": "4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.1, 1.2, 1.5 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.3\n\n**Second hazard class (table column):** 4.1\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 3\n\n**What the code requires:** 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.3", "class_b": "4.1", "code": "3", "file": "carriage-by-vessel-explosives-4-1-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-4-1-1-3", "mode": "Carriage by Vessel", "requirement": "3\u2014\u201cSeparated by a complete compartment or hold from.\u201d", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.4, 1.6\n\n**Second hazard class (table column):** 4.1\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.4, 1.6", "class_b": "4.1", "code": "2", "file": "carriage-by-vessel-explosives-4-1-1-4-1-6.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-4-1-1-4-1-6", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.4, 1.6 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.1, 1.2, 1.5\n\n**Second hazard class (table column):** 4.2\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 4\n\n**What the code requires:** 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.1, 1.2, 1.5", "class_b": "4.2", "code": "4", "file": "carriage-by-vessel-explosives-4-2-1-1-1-2-1-5.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-4-2-1-1-1-2-1-5", "mode": "Carriage by Vessel", "requirement": "4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.1, 1.2, 1.5 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.3\n\n**Second hazard class (table column):** 4.2\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 3\n\n**What the code requires:** 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.3", "class_b": "4.2", "code": "3", "file": "carriage-by-vessel-explosives-4-2-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-4-2-1-3", "mode": "Carriage by Vessel", "requirement": "3\u2014\u201cSeparated by a complete compartment or hold from.\u201d", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.4, 1.6\n\n**Second hazard class (table column):** 4.2\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.4, 1.6", "class_b": "4.2", "code": "2", "file": "carriage-by-vessel-explosives-4-2-1-4-1-6.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-4-2-1-4-1-6", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.4, 1.6 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.1, 1.2, 1.5\n\n**Second hazard class (table column):** 4.3\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 4\n\n**What the code requires:** 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.1, 1.2, 1.5", "class_b": "4.3", "code": "4", "file": "carriage-by-vessel-explosives-4-3-1-1-1-2-1-5.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-4-3-1-1-1-2-1-5", "mode": "Carriage by Vessel", "requirement": "4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.1, 1.2, 1.5 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.3\n\n**Second hazard class (table column):** 4.3\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 4\n\n**What the code requires:** 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.3", "class_b": "4.3", "code": "4", "file": "carriage-by-vessel-explosives-4-3-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-4-3-1-3", "mode": "Carriage by Vessel", "requirement": "4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.4, 1.6\n\n**Second hazard class (table column):** 4.3\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.4, 1.6", "class_b": "4.3", "code": "2", "file": "carriage-by-vessel-explosives-4-3-1-4-1-6.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-4-3-1-4-1-6", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.4, 1.6 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.1, 1.2, 1.5\n\n**Second hazard class (table column):** 5.1\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 4\n\n**What the code requires:** 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.1, 1.2, 1.5", "class_b": "5.1", "code": "4", "file": "carriage-by-vessel-explosives-5-1-1-1-1-2-1-5.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-5-1-1-1-1-2-1-5", "mode": "Carriage by Vessel", "requirement": "4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.1, 1.2, 1.5 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.3\n\n**Second hazard class (table column):** 5.1\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 4\n\n**What the code requires:** 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.3", "class_b": "5.1", "code": "4", "file": "carriage-by-vessel-explosives-5-1-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-5-1-1-3", "mode": "Carriage by Vessel", "requirement": "4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.4, 1.6\n\n**Second hazard class (table column):** 5.1\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.4, 1.6", "class_b": "5.1", "code": "2", "file": "carriage-by-vessel-explosives-5-1-1-4-1-6.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-5-1-1-4-1-6", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.4, 1.6 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.1, 1.2, 1.5\n\n**Second hazard class (table column):** 5.2\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 4\n\n**What the code requires:** 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.1, 1.2, 1.5", "class_b": "5.2", "code": "4", "file": "carriage-by-vessel-explosives-5-2-1-1-1-2-1-5.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-5-2-1-1-1-2-1-5", "mode": "Carriage by Vessel", "requirement": "4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.1, 1.2, 1.5 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.3\n\n**Second hazard class (table column):** 5.2\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 4\n\n**What the code requires:** 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.3", "class_b": "5.2", "code": "4", "file": "carriage-by-vessel-explosives-5-2-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-5-2-1-3", "mode": "Carriage by Vessel", "requirement": "4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.4, 1.6\n\n**Second hazard class (table column):** 5.2\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.4, 1.6", "class_b": "5.2", "code": "2", "file": "carriage-by-vessel-explosives-5-2-1-4-1-6.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-5-2-1-4-1-6", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.4, 1.6 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.1, 1.2, 1.5\n\n**Second hazard class (table column):** 6.1\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.1, 1.2, 1.5", "class_b": "6.1", "code": "2", "file": "carriage-by-vessel-explosives-6-1-1-1-1-2-1-5.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-6-1-1-1-1-2-1-5", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.1, 1.2, 1.5 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.3\n\n**Second hazard class (table column):** 6.1\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.3", "class_b": "6.1", "code": "2", "file": "carriage-by-vessel-explosives-6-1-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-6-1-1-3", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.4, 1.6\n\n**Second hazard class (table column):** 6.1\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.4, 1.6", "class_b": "6.1", "code": "X", "file": "carriage-by-vessel-explosives-6-1-1-4-1-6.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-6-1-1-4-1-6", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.4, 1.6 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.1, 1.2, 1.5\n\n**Second hazard class (table column):** 6.2\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 4\n\n**What the code requires:** 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.1, 1.2, 1.5", "class_b": "6.2", "code": "4", "file": "carriage-by-vessel-explosives-6-2-1-1-1-2-1-5.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-6-2-1-1-1-2-1-5", "mode": "Carriage by Vessel", "requirement": "4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.1, 1.2, 1.5 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.3\n\n**Second hazard class (table column):** 6.2\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 4\n\n**What the code requires:** 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.3", "class_b": "6.2", "code": "4", "file": "carriage-by-vessel-explosives-6-2-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-6-2-1-3", "mode": "Carriage by Vessel", "requirement": "4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.4, 1.6\n\n**Second hazard class (table column):** 6.2\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 4\n\n**What the code requires:** 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.4, 1.6", "class_b": "6.2", "code": "4", "file": "carriage-by-vessel-explosives-6-2-1-4-1-6.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-6-2-1-4-1-6", "mode": "Carriage by Vessel", "requirement": "4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.4, 1.6 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.1, 1.2, 1.5\n\n**Second hazard class (table column):** 7\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.1, 1.2, 1.5", "class_b": "7", "code": "2", "file": "carriage-by-vessel-explosives-7-1-1-1-2-1-5.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-7-1-1-1-2-1-5", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.1, 1.2, 1.5 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.3\n\n**Second hazard class (table column):** 7\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.3", "class_b": "7", "code": "2", "file": "carriage-by-vessel-explosives-7-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-7-1-3", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.4, 1.6\n\n**Second hazard class (table column):** 7\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.4, 1.6", "class_b": "7", "code": "2", "file": "carriage-by-vessel-explosives-7-1-4-1-6.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-7-1-4-1-6", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.4, 1.6 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.1, 1.2, 1.5\n\n**Second hazard class (table column):** 8\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 4\n\n**What the code requires:** 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.1, 1.2, 1.5", "class_b": "8", "code": "4", "file": "carriage-by-vessel-explosives-8-1-1-1-2-1-5.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-8-1-1-1-2-1-5", "mode": "Carriage by Vessel", "requirement": "4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.1, 1.2, 1.5 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.3\n\n**Second hazard class (table column):** 8\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.3", "class_b": "8", "code": "2", "file": "carriage-by-vessel-explosives-8-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-8-1-3", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.4, 1.6\n\n**Second hazard class (table column):** 8\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.4, 1.6", "class_b": "8", "code": "2", "file": "carriage-by-vessel-explosives-8-1-4-1-6.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-8-1-4-1-6", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.4, 1.6 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.1, 1.2, 1.5\n\n**Second hazard class (table column):** 9\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.1, 1.2, 1.5", "class_b": "9", "code": "X", "file": "carriage-by-vessel-explosives-9-1-1-1-2-1-5.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-9-1-1-1-2-1-5", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.1, 1.2, 1.5 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.3\n\n**Second hazard class (table column):** 9\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.3", "class_b": "9", "code": "X", "file": "carriage-by-vessel-explosives-9-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-9-1-3", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 1.4, 1.6\n\n**Second hazard class (table column):** 9\n\n**Row description:** Explosives\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "1.4, 1.6", "class_b": "9", "code": "X", "file": "carriage-by-vessel-explosives-9-1-4-1-6.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-explosives-9-1-4-1-6", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Explosives", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "1.4, 1.6 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.1\n\n**Second hazard class (table column):** 1.1, 1.2, 1.5\n\n**Row description:** Flammable gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 4\n\n**What the code requires:** 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.1", "class_b": "1.1, 1.2, 1.5", "code": "4", "file": "carriage-by-vessel-flammable-gases-1-1-1-2-1-5-2-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-gases-1-1-1-2-1-5-2-1", "mode": "Carriage by Vessel", "requirement": "4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d", "row_name": "Flammable gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.1\n\n**Second hazard class (table column):** 1.3\n\n**Row description:** Flammable gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 4\n\n**What the code requires:** 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.1", "class_b": "1.3", "code": "4", "file": "carriage-by-vessel-flammable-gases-1-3-2-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-gases-1-3-2-1", "mode": "Carriage by Vessel", "requirement": "4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d", "row_name": "Flammable gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.1\n\n**Second hazard class (table column):** 1.4, 1.6\n\n**Row description:** Flammable gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.1", "class_b": "1.4, 1.6", "code": "2", "file": "carriage-by-vessel-flammable-gases-1-4-1-6-2-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-gases-1-4-1-6-2-1", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Flammable gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.1\n\n**Second hazard class (table column):** 2.1\n\n**Row description:** Flammable gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.1", "class_b": "2.1", "code": "X", "file": "carriage-by-vessel-flammable-gases-2-1-2-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-gases-2-1-2-1", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Flammable gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.1\n\n**Second hazard class (table column):** 2.2\n\n**Row description:** Flammable gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.1", "class_b": "2.2", "code": "X", "file": "carriage-by-vessel-flammable-gases-2-2-2-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-gases-2-2-2-1", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Flammable gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.1\n\n**Second hazard class (table column):** 2.3\n\n**Row description:** Flammable gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.1", "class_b": "2.3", "code": "X", "file": "carriage-by-vessel-flammable-gases-2-3-2-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-gases-2-3-2-1", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Flammable gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.1\n\n**Second hazard class (table column):** 3\n\n**Row description:** Flammable gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.1", "class_b": "3", "code": "2", "file": "carriage-by-vessel-flammable-gases-3-2-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-gases-3-2-1", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Flammable gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.1\n\n**Second hazard class (table column):** 4.1\n\n**Row description:** Flammable gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.1", "class_b": "4.1", "code": "1", "file": "carriage-by-vessel-flammable-gases-4-1-2-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-gases-4-1-2-1", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Flammable gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.1\n\n**Second hazard class (table column):** 4.2\n\n**Row description:** Flammable gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.1", "class_b": "4.2", "code": "2", "file": "carriage-by-vessel-flammable-gases-4-2-2-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-gases-4-2-2-1", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Flammable gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.1\n\n**Second hazard class (table column):** 4.3\n\n**Row description:** Flammable gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.1", "class_b": "4.3", "code": "2", "file": "carriage-by-vessel-flammable-gases-4-3-2-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-gases-4-3-2-1", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Flammable gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.1\n\n**Second hazard class (table column):** 5.1\n\n**Row description:** Flammable gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.1", "class_b": "5.1", "code": "2", "file": "carriage-by-vessel-flammable-gases-5-1-2-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-gases-5-1-2-1", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Flammable gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.1\n\n**Second hazard class (table column):** 5.2\n\n**Row description:** Flammable gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.1", "class_b": "5.2", "code": "2", "file": "carriage-by-vessel-flammable-gases-5-2-2-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-gases-5-2-2-1", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Flammable gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.1\n\n**Second hazard class (table column):** 6.1\n\n**Row description:** Flammable gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.1", "class_b": "6.1", "code": "X", "file": "carriage-by-vessel-flammable-gases-6-1-2-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-gases-6-1-2-1", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Flammable gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.1\n\n**Second hazard class (table column):** 6.2\n\n**Row description:** Flammable gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 4\n\n**What the code requires:** 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.1", "class_b": "6.2", "code": "4", "file": "carriage-by-vessel-flammable-gases-6-2-2-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-gases-6-2-2-1", "mode": "Carriage by Vessel", "requirement": "4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d", "row_name": "Flammable gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.1\n\n**Second hazard class (table column):** 7\n\n**Row description:** Flammable gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.1", "class_b": "7", "code": "2", "file": "carriage-by-vessel-flammable-gases-7-2-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-gases-7-2-1", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Flammable gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.1\n\n**Second hazard class (table column):** 8\n\n**Row description:** Flammable gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.1", "class_b": "8", "code": "1", "file": "carriage-by-vessel-flammable-gases-8-2-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-gases-8-2-1", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Flammable gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.1\n\n**Second hazard class (table column):** 9\n\n**Row description:** Flammable gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.1", "class_b": "9", "code": "X", "file": "carriage-by-vessel-flammable-gases-9-2-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-gases-9-2-1", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Flammable gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 3\n\n**Second hazard class (table column):** 1.1, 1.2, 1.5\n\n**Row description:** Flammable liquids\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 4\n\n**What the code requires:** 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "3", "class_b": "1.1, 1.2, 1.5", "code": "4", "file": "carriage-by-vessel-flammable-liquids-1-1-1-2-1-5-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-liquids-1-1-1-2-1-5-3", "mode": "Carriage by Vessel", "requirement": "4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d", "row_name": "Flammable liquids", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 3\n\n**Second hazard class (table column):** 1.3\n\n**Row description:** Flammable liquids\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 4\n\n**What the code requires:** 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "3", "class_b": "1.3", "code": "4", "file": "carriage-by-vessel-flammable-liquids-1-3-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-liquids-1-3-3", "mode": "Carriage by Vessel", "requirement": "4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d", "row_name": "Flammable liquids", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 3\n\n**Second hazard class (table column):** 1.4, 1.6\n\n**Row description:** Flammable liquids\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "3", "class_b": "1.4, 1.6", "code": "2", "file": "carriage-by-vessel-flammable-liquids-1-4-1-6-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-liquids-1-4-1-6-3", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Flammable liquids", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 3\n\n**Second hazard class (table column):** 2.1\n\n**Row description:** Flammable liquids\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "3", "class_b": "2.1", "code": "2", "file": "carriage-by-vessel-flammable-liquids-2-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-liquids-2-1-3", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Flammable liquids", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 3\n\n**Second hazard class (table column):** 2.2\n\n**Row description:** Flammable liquids\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "3", "class_b": "2.2", "code": "1", "file": "carriage-by-vessel-flammable-liquids-2-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-liquids-2-2-3", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Flammable liquids", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 3\n\n**Second hazard class (table column):** 2.3\n\n**Row description:** Flammable liquids\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "3", "class_b": "2.3", "code": "2", "file": "carriage-by-vessel-flammable-liquids-2-3-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-liquids-2-3-3", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Flammable liquids", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 3\n\n**Second hazard class (table column):** 3\n\n**Row description:** Flammable liquids\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "3", "class_b": "3", "code": "X", "file": "carriage-by-vessel-flammable-liquids-3-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-liquids-3-3", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Flammable liquids", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 3\n\n**Second hazard class (table column):** 4.1\n\n**Row description:** Flammable liquids\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "3", "class_b": "4.1", "code": "X", "file": "carriage-by-vessel-flammable-liquids-4-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-liquids-4-1-3", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Flammable liquids", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 3\n\n**Second hazard class (table column):** 4.2\n\n**Row description:** Flammable liquids\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "3", "class_b": "4.2", "code": "2", "file": "carriage-by-vessel-flammable-liquids-4-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-liquids-4-2-3", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Flammable liquids", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 3\n\n**Second hazard class (table column):** 4.3\n\n**Row description:** Flammable liquids\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "3", "class_b": "4.3", "code": "2", "file": "carriage-by-vessel-flammable-liquids-4-3-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-liquids-4-3-3", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Flammable liquids", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 3\n\n**Second hazard class (table column):** 5.1\n\n**Row description:** Flammable liquids\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "3", "class_b": "5.1", "code": "2", "file": "carriage-by-vessel-flammable-liquids-5-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-liquids-5-1-3", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Flammable liquids", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 3\n\n**Second hazard class (table column):** 5.2\n\n**Row description:** Flammable liquids\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "3", "class_b": "5.2", "code": "2", "file": "carriage-by-vessel-flammable-liquids-5-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-liquids-5-2-3", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Flammable liquids", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 3\n\n**Second hazard class (table column):** 6.1\n\n**Row description:** Flammable liquids\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "3", "class_b": "6.1", "code": "X", "file": "carriage-by-vessel-flammable-liquids-6-1-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-liquids-6-1-3", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Flammable liquids", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 3\n\n**Second hazard class (table column):** 6.2\n\n**Row description:** Flammable liquids\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 3\n\n**What the code requires:** 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "3", "class_b": "6.2", "code": "3", "file": "carriage-by-vessel-flammable-liquids-6-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-liquids-6-2-3", "mode": "Carriage by Vessel", "requirement": "3\u2014\u201cSeparated by a complete compartment or hold from.\u201d", "row_name": "Flammable liquids", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 3\n\n**Second hazard class (table column):** 7\n\n**Row description:** Flammable liquids\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "3", "class_b": "7", "code": "2", "file": "carriage-by-vessel-flammable-liquids-7-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-liquids-7-3", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Flammable liquids", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 3\n\n**Second hazard class (table column):** 8\n\n**Row description:** Flammable liquids\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "3", "class_b": "8", "code": "X", "file": "carriage-by-vessel-flammable-liquids-8-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-liquids-8-3", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Flammable liquids", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 3\n\n**Second hazard class (table column):** 9\n\n**Row description:** Flammable liquids\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "3", "class_b": "9", "code": "X", "file": "carriage-by-vessel-flammable-liquids-9-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-liquids-9-3", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Flammable liquids", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.1\n\n**Second hazard class (table column):** 1.1, 1.2, 1.5\n\n**Row description:** Flammable solids\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 4\n\n**What the code requires:** 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.1", "class_b": "1.1, 1.2, 1.5", "code": "4", "file": "carriage-by-vessel-flammable-solids-1-1-1-2-1-5-4-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-solids-1-1-1-2-1-5-4-1", "mode": "Carriage by Vessel", "requirement": "4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d", "row_name": "Flammable solids", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.1\n\n**Second hazard class (table column):** 1.3\n\n**Row description:** Flammable solids\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 3\n\n**What the code requires:** 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.1", "class_b": "1.3", "code": "3", "file": "carriage-by-vessel-flammable-solids-1-3-4-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-solids-1-3-4-1", "mode": "Carriage by Vessel", "requirement": "3\u2014\u201cSeparated by a complete compartment or hold from.\u201d", "row_name": "Flammable solids", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.1\n\n**Second hazard class (table column):** 1.4, 1.6\n\n**Row description:** Flammable solids\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.1", "class_b": "1.4, 1.6", "code": "2", "file": "carriage-by-vessel-flammable-solids-1-4-1-6-4-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-solids-1-4-1-6-4-1", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Flammable solids", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.1\n\n**Second hazard class (table column):** 2.1\n\n**Row description:** Flammable solids\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.1", "class_b": "2.1", "code": "1", "file": "carriage-by-vessel-flammable-solids-2-1-4-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-solids-2-1-4-1", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Flammable solids", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.1\n\n**Second hazard class (table column):** 2.2\n\n**Row description:** Flammable solids\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.1", "class_b": "2.2", "code": "X", "file": "carriage-by-vessel-flammable-solids-2-2-4-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-solids-2-2-4-1", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Flammable solids", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.1\n\n**Second hazard class (table column):** 2.3\n\n**Row description:** Flammable solids\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.1", "class_b": "2.3", "code": "X", "file": "carriage-by-vessel-flammable-solids-2-3-4-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-solids-2-3-4-1", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Flammable solids", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.1\n\n**Second hazard class (table column):** 3\n\n**Row description:** Flammable solids\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.1", "class_b": "3", "code": "X", "file": "carriage-by-vessel-flammable-solids-3-4-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-solids-3-4-1", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Flammable solids", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.1\n\n**Second hazard class (table column):** 4.1\n\n**Row description:** Flammable solids\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.1", "class_b": "4.1", "code": "X", "file": "carriage-by-vessel-flammable-solids-4-1-4-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-solids-4-1-4-1", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Flammable solids", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.1\n\n**Second hazard class (table column):** 4.2\n\n**Row description:** Flammable solids\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.1", "class_b": "4.2", "code": "1", "file": "carriage-by-vessel-flammable-solids-4-2-4-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-solids-4-2-4-1", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Flammable solids", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.1\n\n**Second hazard class (table column):** 4.3\n\n**Row description:** Flammable solids\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.1", "class_b": "4.3", "code": "X", "file": "carriage-by-vessel-flammable-solids-4-3-4-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-solids-4-3-4-1", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Flammable solids", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.1\n\n**Second hazard class (table column):** 5.1\n\n**Row description:** Flammable solids\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.1", "class_b": "5.1", "code": "1", "file": "carriage-by-vessel-flammable-solids-5-1-4-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-solids-5-1-4-1", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Flammable solids", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.1\n\n**Second hazard class (table column):** 5.2\n\n**Row description:** Flammable solids\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.1", "class_b": "5.2", "code": "2", "file": "carriage-by-vessel-flammable-solids-5-2-4-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-solids-5-2-4-1", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Flammable solids", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.1\n\n**Second hazard class (table column):** 6.1\n\n**Row description:** Flammable solids\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.1", "class_b": "6.1", "code": "X", "file": "carriage-by-vessel-flammable-solids-6-1-4-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-solids-6-1-4-1", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Flammable solids", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.1\n\n**Second hazard class (table column):** 6.2\n\n**Row description:** Flammable solids\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 3\n\n**What the code requires:** 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.1", "class_b": "6.2", "code": "3", "file": "carriage-by-vessel-flammable-solids-6-2-4-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-solids-6-2-4-1", "mode": "Carriage by Vessel", "requirement": "3\u2014\u201cSeparated by a complete compartment or hold from.\u201d", "row_name": "Flammable solids", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.1\n\n**Second hazard class (table column):** 7\n\n**Row description:** Flammable solids\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.1", "class_b": "7", "code": "2", "file": "carriage-by-vessel-flammable-solids-7-4-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-solids-7-4-1", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Flammable solids", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.1\n\n**Second hazard class (table column):** 8\n\n**Row description:** Flammable solids\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.1", "class_b": "8", "code": "1", "file": "carriage-by-vessel-flammable-solids-8-4-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-solids-8-4-1", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Flammable solids", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.1\n\n**Second hazard class (table column):** 9\n\n**Row description:** Flammable solids\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.1", "class_b": "9", "code": "X", "file": "carriage-by-vessel-flammable-solids-9-4-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-flammable-solids-9-4-1", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Flammable solids", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.2\n\n**Second hazard class (table column):** 1.1, 1.2, 1.5\n\n**Row description:** Infectious substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 4\n\n**What the code requires:** 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "6.2", "class_b": "1.1, 1.2, 1.5", "code": "4", "file": "carriage-by-vessel-infectious-substances-1-1-1-2-1-5-6-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-infectious-substances-1-1-1-2-1-5-6-2", "mode": "Carriage by Vessel", "requirement": "4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d", "row_name": "Infectious substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "6.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.2\n\n**Second hazard class (table column):** 1.3\n\n**Row description:** Infectious substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 4\n\n**What the code requires:** 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "6.2", "class_b": "1.3", "code": "4", "file": "carriage-by-vessel-infectious-substances-1-3-6-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-infectious-substances-1-3-6-2", "mode": "Carriage by Vessel", "requirement": "4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d", "row_name": "Infectious substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "6.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.2\n\n**Second hazard class (table column):** 1.4, 1.6\n\n**Row description:** Infectious substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 4\n\n**What the code requires:** 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "6.2", "class_b": "1.4, 1.6", "code": "4", "file": "carriage-by-vessel-infectious-substances-1-4-1-6-6-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-infectious-substances-1-4-1-6-6-2", "mode": "Carriage by Vessel", "requirement": "4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d", "row_name": "Infectious substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "6.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.2\n\n**Second hazard class (table column):** 2.1\n\n**Row description:** Infectious substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 4\n\n**What the code requires:** 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "6.2", "class_b": "2.1", "code": "4", "file": "carriage-by-vessel-infectious-substances-2-1-6-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-infectious-substances-2-1-6-2", "mode": "Carriage by Vessel", "requirement": "4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d", "row_name": "Infectious substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "6.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.2\n\n**Second hazard class (table column):** 2.2\n\n**Row description:** Infectious substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "6.2", "class_b": "2.2", "code": "2", "file": "carriage-by-vessel-infectious-substances-2-2-6-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-infectious-substances-2-2-6-2", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Infectious substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "6.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.2\n\n**Second hazard class (table column):** 2.3\n\n**Row description:** Infectious substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "6.2", "class_b": "2.3", "code": "2", "file": "carriage-by-vessel-infectious-substances-2-3-6-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-infectious-substances-2-3-6-2", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Infectious substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "6.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.2\n\n**Second hazard class (table column):** 3\n\n**Row description:** Infectious substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 3\n\n**What the code requires:** 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "6.2", "class_b": "3", "code": "3", "file": "carriage-by-vessel-infectious-substances-3-6-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-infectious-substances-3-6-2", "mode": "Carriage by Vessel", "requirement": "3\u2014\u201cSeparated by a complete compartment or hold from.\u201d", "row_name": "Infectious substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "6.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.2\n\n**Second hazard class (table column):** 4.1\n\n**Row description:** Infectious substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 3\n\n**What the code requires:** 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "6.2", "class_b": "4.1", "code": "3", "file": "carriage-by-vessel-infectious-substances-4-1-6-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-infectious-substances-4-1-6-2", "mode": "Carriage by Vessel", "requirement": "3\u2014\u201cSeparated by a complete compartment or hold from.\u201d", "row_name": "Infectious substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "6.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.2\n\n**Second hazard class (table column):** 4.2\n\n**Row description:** Infectious substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 3\n\n**What the code requires:** 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "6.2", "class_b": "4.2", "code": "3", "file": "carriage-by-vessel-infectious-substances-4-2-6-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-infectious-substances-4-2-6-2", "mode": "Carriage by Vessel", "requirement": "3\u2014\u201cSeparated by a complete compartment or hold from.\u201d", "row_name": "Infectious substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "6.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.2\n\n**Second hazard class (table column):** 4.3\n\n**Row description:** Infectious substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "6.2", "class_b": "4.3", "code": "2", "file": "carriage-by-vessel-infectious-substances-4-3-6-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-infectious-substances-4-3-6-2", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Infectious substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "6.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.2\n\n**Second hazard class (table column):** 5.1\n\n**Row description:** Infectious substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 3\n\n**What the code requires:** 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "6.2", "class_b": "5.1", "code": "3", "file": "carriage-by-vessel-infectious-substances-5-1-6-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-infectious-substances-5-1-6-2", "mode": "Carriage by Vessel", "requirement": "3\u2014\u201cSeparated by a complete compartment or hold from.\u201d", "row_name": "Infectious substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "6.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.2\n\n**Second hazard class (table column):** 5.2\n\n**Row description:** Infectious substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 3\n\n**What the code requires:** 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "6.2", "class_b": "5.2", "code": "3", "file": "carriage-by-vessel-infectious-substances-5-2-6-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-infectious-substances-5-2-6-2", "mode": "Carriage by Vessel", "requirement": "3\u2014\u201cSeparated by a complete compartment or hold from.\u201d", "row_name": "Infectious substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "6.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.2\n\n**Second hazard class (table column):** 6.1\n\n**Row description:** Infectious substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "6.2", "class_b": "6.1", "code": "1", "file": "carriage-by-vessel-infectious-substances-6-1-6-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-infectious-substances-6-1-6-2", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Infectious substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "6.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.2\n\n**Second hazard class (table column):** 6.2\n\n**Row description:** Infectious substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "6.2", "class_b": "6.2", "code": "X", "file": "carriage-by-vessel-infectious-substances-6-2-6-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-infectious-substances-6-2-6-2", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Infectious substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "6.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.2\n\n**Second hazard class (table column):** 7\n\n**Row description:** Infectious substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 3\n\n**What the code requires:** 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "6.2", "class_b": "7", "code": "3", "file": "carriage-by-vessel-infectious-substances-7-6-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-infectious-substances-7-6-2", "mode": "Carriage by Vessel", "requirement": "3\u2014\u201cSeparated by a complete compartment or hold from.\u201d", "row_name": "Infectious substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "6.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.2\n\n**Second hazard class (table column):** 8\n\n**Row description:** Infectious substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 3\n\n**What the code requires:** 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "6.2", "class_b": "8", "code": "3", "file": "carriage-by-vessel-infectious-substances-8-6-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-infectious-substances-8-6-2", "mode": "Carriage by Vessel", "requirement": "3\u2014\u201cSeparated by a complete compartment or hold from.\u201d", "row_name": "Infectious substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "6.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.2\n\n**Second hazard class (table column):** 9\n\n**Row description:** Infectious substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "6.2", "class_b": "9", "code": "X", "file": "carriage-by-vessel-infectious-substances-9-6-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-infectious-substances-9-6-2", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Infectious substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "6.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 9\n\n**Second hazard class (table column):** 1.1, 1.2, 1.5\n\n**Row description:** Miscellaneous dangerous substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "9", "class_b": "1.1, 1.2, 1.5", "code": "X", "file": "carriage-by-vessel-miscellaneous-dangerous-substances-1-1-1-2-1-5-9.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-miscellaneous-dangerous-substances-1-1-1-2-1-5-9", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Miscellaneous dangerous substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "9 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 9\n\n**Second hazard class (table column):** 1.3\n\n**Row description:** Miscellaneous dangerous substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "9", "class_b": "1.3", "code": "X", "file": "carriage-by-vessel-miscellaneous-dangerous-substances-1-3-9.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-miscellaneous-dangerous-substances-1-3-9", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Miscellaneous dangerous substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "9 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 9\n\n**Second hazard class (table column):** 1.4, 1.6\n\n**Row description:** Miscellaneous dangerous substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "9", "class_b": "1.4, 1.6", "code": "X", "file": "carriage-by-vessel-miscellaneous-dangerous-substances-1-4-1-6-9.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-miscellaneous-dangerous-substances-1-4-1-6-9", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Miscellaneous dangerous substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "9 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 9\n\n**Second hazard class (table column):** 2.1\n\n**Row description:** Miscellaneous dangerous substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "9", "class_b": "2.1", "code": "X", "file": "carriage-by-vessel-miscellaneous-dangerous-substances-2-1-9.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-miscellaneous-dangerous-substances-2-1-9", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Miscellaneous dangerous substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "9 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 9\n\n**Second hazard class (table column):** 2.2\n\n**Row description:** Miscellaneous dangerous substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "9", "class_b": "2.2", "code": "X", "file": "carriage-by-vessel-miscellaneous-dangerous-substances-2-2-9.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-miscellaneous-dangerous-substances-2-2-9", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Miscellaneous dangerous substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "9 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 9\n\n**Second hazard class (table column):** 2.3\n\n**Row description:** Miscellaneous dangerous substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "9", "class_b": "2.3", "code": "X", "file": "carriage-by-vessel-miscellaneous-dangerous-substances-2-3-9.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-miscellaneous-dangerous-substances-2-3-9", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Miscellaneous dangerous substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "9 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 9\n\n**Second hazard class (table column):** 3\n\n**Row description:** Miscellaneous dangerous substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "9", "class_b": "3", "code": "X", "file": "carriage-by-vessel-miscellaneous-dangerous-substances-3-9.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-miscellaneous-dangerous-substances-3-9", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Miscellaneous dangerous substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "9 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 9\n\n**Second hazard class (table column):** 4.1\n\n**Row description:** Miscellaneous dangerous substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "9", "class_b": "4.1", "code": "X", "file": "carriage-by-vessel-miscellaneous-dangerous-substances-4-1-9.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-miscellaneous-dangerous-substances-4-1-9", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Miscellaneous dangerous substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "9 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 9\n\n**Second hazard class (table column):** 4.2\n\n**Row description:** Miscellaneous dangerous substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "9", "class_b": "4.2", "code": "X", "file": "carriage-by-vessel-miscellaneous-dangerous-substances-4-2-9.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-miscellaneous-dangerous-substances-4-2-9", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Miscellaneous dangerous substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "9 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 9\n\n**Second hazard class (table column):** 4.3\n\n**Row description:** Miscellaneous dangerous substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "9", "class_b": "4.3", "code": "X", "file": "carriage-by-vessel-miscellaneous-dangerous-substances-4-3-9.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-miscellaneous-dangerous-substances-4-3-9", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Miscellaneous dangerous substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "9 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 9\n\n**Second hazard class (table column):** 5.1\n\n**Row description:** Miscellaneous dangerous substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "9", "class_b": "5.1", "code": "X", "file": "carriage-by-vessel-miscellaneous-dangerous-substances-5-1-9.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-miscellaneous-dangerous-substances-5-1-9", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Miscellaneous dangerous substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "9 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 9\n\n**Second hazard class (table column):** 5.2\n\n**Row description:** Miscellaneous dangerous substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "9", "class_b": "5.2", "code": "X", "file": "carriage-by-vessel-miscellaneous-dangerous-substances-5-2-9.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-miscellaneous-dangerous-substances-5-2-9", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Miscellaneous dangerous substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "9 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 9\n\n**Second hazard class (table column):** 6.1\n\n**Row description:** Miscellaneous dangerous substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "9", "class_b": "6.1", "code": "X", "file": "carriage-by-vessel-miscellaneous-dangerous-substances-6-1-9.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-miscellaneous-dangerous-substances-6-1-9", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Miscellaneous dangerous substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "9 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 9\n\n**Second hazard class (table column):** 6.2\n\n**Row description:** Miscellaneous dangerous substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "9", "class_b": "6.2", "code": "X", "file": "carriage-by-vessel-miscellaneous-dangerous-substances-6-2-9.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-miscellaneous-dangerous-substances-6-2-9", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Miscellaneous dangerous substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "9 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 9\n\n**Second hazard class (table column):** 7\n\n**Row description:** Miscellaneous dangerous substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "9", "class_b": "7", "code": "X", "file": "carriage-by-vessel-miscellaneous-dangerous-substances-7-9.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-miscellaneous-dangerous-substances-7-9", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Miscellaneous dangerous substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "9 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 9\n\n**Second hazard class (table column):** 8\n\n**Row description:** Miscellaneous dangerous substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "9", "class_b": "8", "code": "X", "file": "carriage-by-vessel-miscellaneous-dangerous-substances-8-9.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-miscellaneous-dangerous-substances-8-9", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Miscellaneous dangerous substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "9 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 9\n\n**Second hazard class (table column):** 9\n\n**Row description:** Miscellaneous dangerous substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "9", "class_b": "9", "code": "X", "file": "carriage-by-vessel-miscellaneous-dangerous-substances-9-9.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-miscellaneous-dangerous-substances-9-9", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Miscellaneous dangerous substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "9 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.2\n\n**Second hazard class (table column):** 1.1, 1.2, 1.5\n\n**Row description:** Non-toxic, non-flammable gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.2", "class_b": "1.1, 1.2, 1.5", "code": "2", "file": "carriage-by-vessel-non-toxic-non-flammable-gases-1-1-1-2-1-5-2-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-non-toxic-non-flammable-gases-1-1-1-2-1-5-2-2", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Non-toxic, non-flammable gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.2\n\n**Second hazard class (table column):** 1.3\n\n**Row description:** Non-toxic, non-flammable gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.2", "class_b": "1.3", "code": "2", "file": "carriage-by-vessel-non-toxic-non-flammable-gases-1-3-2-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-non-toxic-non-flammable-gases-1-3-2-2", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Non-toxic, non-flammable gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.2\n\n**Second hazard class (table column):** 1.4, 1.6\n\n**Row description:** Non-toxic, non-flammable gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.2", "class_b": "1.4, 1.6", "code": "1", "file": "carriage-by-vessel-non-toxic-non-flammable-gases-1-4-1-6-2-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-non-toxic-non-flammable-gases-1-4-1-6-2-2", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Non-toxic, non-flammable gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.2\n\n**Second hazard class (table column):** 2.1\n\n**Row description:** Non-toxic, non-flammable gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.2", "class_b": "2.1", "code": "X", "file": "carriage-by-vessel-non-toxic-non-flammable-gases-2-1-2-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-non-toxic-non-flammable-gases-2-1-2-2", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Non-toxic, non-flammable gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.2\n\n**Second hazard class (table column):** 2.2\n\n**Row description:** Non-toxic, non-flammable gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.2", "class_b": "2.2", "code": "X", "file": "carriage-by-vessel-non-toxic-non-flammable-gases-2-2-2-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-non-toxic-non-flammable-gases-2-2-2-2", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Non-toxic, non-flammable gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.2\n\n**Second hazard class (table column):** 2.3\n\n**Row description:** Non-toxic, non-flammable gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.2", "class_b": "2.3", "code": "X", "file": "carriage-by-vessel-non-toxic-non-flammable-gases-2-3-2-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-non-toxic-non-flammable-gases-2-3-2-2", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Non-toxic, non-flammable gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.2\n\n**Second hazard class (table column):** 3\n\n**Row description:** Non-toxic, non-flammable gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.2", "class_b": "3", "code": "1", "file": "carriage-by-vessel-non-toxic-non-flammable-gases-3-2-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-non-toxic-non-flammable-gases-3-2-2", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Non-toxic, non-flammable gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.2\n\n**Second hazard class (table column):** 4.1\n\n**Row description:** Non-toxic, non-flammable gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.2", "class_b": "4.1", "code": "X", "file": "carriage-by-vessel-non-toxic-non-flammable-gases-4-1-2-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-non-toxic-non-flammable-gases-4-1-2-2", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Non-toxic, non-flammable gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.2\n\n**Second hazard class (table column):** 4.2\n\n**Row description:** Non-toxic, non-flammable gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.2", "class_b": "4.2", "code": "1", "file": "carriage-by-vessel-non-toxic-non-flammable-gases-4-2-2-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-non-toxic-non-flammable-gases-4-2-2-2", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Non-toxic, non-flammable gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.2\n\n**Second hazard class (table column):** 4.3\n\n**Row description:** Non-toxic, non-flammable gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.2", "class_b": "4.3", "code": "X", "file": "carriage-by-vessel-non-toxic-non-flammable-gases-4-3-2-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-non-toxic-non-flammable-gases-4-3-2-2", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Non-toxic, non-flammable gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.2\n\n**Second hazard class (table column):** 5.1\n\n**Row description:** Non-toxic, non-flammable gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.2", "class_b": "5.1", "code": "X", "file": "carriage-by-vessel-non-toxic-non-flammable-gases-5-1-2-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-non-toxic-non-flammable-gases-5-1-2-2", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Non-toxic, non-flammable gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.2\n\n**Second hazard class (table column):** 5.2\n\n**Row description:** Non-toxic, non-flammable gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.2", "class_b": "5.2", "code": "1", "file": "carriage-by-vessel-non-toxic-non-flammable-gases-5-2-2-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-non-toxic-non-flammable-gases-5-2-2-2", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Non-toxic, non-flammable gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.2\n\n**Second hazard class (table column):** 6.1\n\n**Row description:** Non-toxic, non-flammable gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.2", "class_b": "6.1", "code": "X", "file": "carriage-by-vessel-non-toxic-non-flammable-gases-6-1-2-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-non-toxic-non-flammable-gases-6-1-2-2", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Non-toxic, non-flammable gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.2\n\n**Second hazard class (table column):** 6.2\n\n**Row description:** Non-toxic, non-flammable gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.2", "class_b": "6.2", "code": "2", "file": "carriage-by-vessel-non-toxic-non-flammable-gases-6-2-2-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-non-toxic-non-flammable-gases-6-2-2-2", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Non-toxic, non-flammable gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.2\n\n**Second hazard class (table column):** 7\n\n**Row description:** Non-toxic, non-flammable gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.2", "class_b": "7", "code": "1", "file": "carriage-by-vessel-non-toxic-non-flammable-gases-7-2-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-non-toxic-non-flammable-gases-7-2-2", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Non-toxic, non-flammable gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.2\n\n**Second hazard class (table column):** 8\n\n**Row description:** Non-toxic, non-flammable gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.2", "class_b": "8", "code": "X", "file": "carriage-by-vessel-non-toxic-non-flammable-gases-8-2-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-non-toxic-non-flammable-gases-8-2-2", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Non-toxic, non-flammable gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.2\n\n**Second hazard class (table column):** 9\n\n**Row description:** Non-toxic, non-flammable gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.2", "class_b": "9", "code": "X", "file": "carriage-by-vessel-non-toxic-non-flammable-gases-9-2-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-non-toxic-non-flammable-gases-9-2-2", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Non-toxic, non-flammable gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.2\n\n**Second hazard class (table column):** 1.1, 1.2, 1.5\n\n**Row description:** Organic peroxides\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 4\n\n**What the code requires:** 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "5.2", "class_b": "1.1, 1.2, 1.5", "code": "4", "file": "carriage-by-vessel-organic-peroxides-1-1-1-2-1-5-5-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-organic-peroxides-1-1-1-2-1-5-5-2", "mode": "Carriage by Vessel", "requirement": "4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d", "row_name": "Organic peroxides", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "5.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.2\n\n**Second hazard class (table column):** 1.3\n\n**Row description:** Organic peroxides\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 4\n\n**What the code requires:** 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "5.2", "class_b": "1.3", "code": "4", "file": "carriage-by-vessel-organic-peroxides-1-3-5-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-organic-peroxides-1-3-5-2", "mode": "Carriage by Vessel", "requirement": "4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d", "row_name": "Organic peroxides", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "5.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.2\n\n**Second hazard class (table column):** 1.4, 1.6\n\n**Row description:** Organic peroxides\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "5.2", "class_b": "1.4, 1.6", "code": "2", "file": "carriage-by-vessel-organic-peroxides-1-4-1-6-5-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-organic-peroxides-1-4-1-6-5-2", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Organic peroxides", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "5.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.2\n\n**Second hazard class (table column):** 2.1\n\n**Row description:** Organic peroxides\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "5.2", "class_b": "2.1", "code": "2", "file": "carriage-by-vessel-organic-peroxides-2-1-5-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-organic-peroxides-2-1-5-2", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Organic peroxides", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "5.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.2\n\n**Second hazard class (table column):** 2.2\n\n**Row description:** Organic peroxides\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "5.2", "class_b": "2.2", "code": "1", "file": "carriage-by-vessel-organic-peroxides-2-2-5-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-organic-peroxides-2-2-5-2", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Organic peroxides", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "5.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.2\n\n**Second hazard class (table column):** 2.3\n\n**Row description:** Organic peroxides\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "5.2", "class_b": "2.3", "code": "2", "file": "carriage-by-vessel-organic-peroxides-2-3-5-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-organic-peroxides-2-3-5-2", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Organic peroxides", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "5.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.2\n\n**Second hazard class (table column):** 3\n\n**Row description:** Organic peroxides\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "5.2", "class_b": "3", "code": "2", "file": "carriage-by-vessel-organic-peroxides-3-5-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-organic-peroxides-3-5-2", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Organic peroxides", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "5.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.2\n\n**Second hazard class (table column):** 4.1\n\n**Row description:** Organic peroxides\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "5.2", "class_b": "4.1", "code": "2", "file": "carriage-by-vessel-organic-peroxides-4-1-5-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-organic-peroxides-4-1-5-2", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Organic peroxides", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "5.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.2\n\n**Second hazard class (table column):** 4.2\n\n**Row description:** Organic peroxides\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "5.2", "class_b": "4.2", "code": "2", "file": "carriage-by-vessel-organic-peroxides-4-2-5-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-organic-peroxides-4-2-5-2", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Organic peroxides", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "5.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.2\n\n**Second hazard class (table column):** 4.3\n\n**Row description:** Organic peroxides\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "5.2", "class_b": "4.3", "code": "2", "file": "carriage-by-vessel-organic-peroxides-4-3-5-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-organic-peroxides-4-3-5-2", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Organic peroxides", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "5.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.2\n\n**Second hazard class (table column):** 5.1\n\n**Row description:** Organic peroxides\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "5.2", "class_b": "5.1", "code": "2", "file": "carriage-by-vessel-organic-peroxides-5-1-5-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-organic-peroxides-5-1-5-2", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Organic peroxides", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "5.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.2\n\n**Second hazard class (table column):** 5.2\n\n**Row description:** Organic peroxides\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "5.2", "class_b": "5.2", "code": "X", "file": "carriage-by-vessel-organic-peroxides-5-2-5-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-organic-peroxides-5-2-5-2", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Organic peroxides", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "5.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.2\n\n**Second hazard class (table column):** 6.1\n\n**Row description:** Organic peroxides\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "5.2", "class_b": "6.1", "code": "1", "file": "carriage-by-vessel-organic-peroxides-6-1-5-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-organic-peroxides-6-1-5-2", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Organic peroxides", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "5.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.2\n\n**Second hazard class (table column):** 6.2\n\n**Row description:** Organic peroxides\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 3\n\n**What the code requires:** 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "5.2", "class_b": "6.2", "code": "3", "file": "carriage-by-vessel-organic-peroxides-6-2-5-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-organic-peroxides-6-2-5-2", "mode": "Carriage by Vessel", "requirement": "3\u2014\u201cSeparated by a complete compartment or hold from.\u201d", "row_name": "Organic peroxides", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "5.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.2\n\n**Second hazard class (table column):** 7\n\n**Row description:** Organic peroxides\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "5.2", "class_b": "7", "code": "2", "file": "carriage-by-vessel-organic-peroxides-7-5-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-organic-peroxides-7-5-2", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Organic peroxides", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "5.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.2\n\n**Second hazard class (table column):** 8\n\n**Row description:** Organic peroxides\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "5.2", "class_b": "8", "code": "2", "file": "carriage-by-vessel-organic-peroxides-8-5-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-organic-peroxides-8-5-2", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Organic peroxides", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "5.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.2\n\n**Second hazard class (table column):** 9\n\n**Row description:** Organic peroxides\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "5.2", "class_b": "9", "code": "X", "file": "carriage-by-vessel-organic-peroxides-9-5-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-organic-peroxides-9-5-2", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Organic peroxides", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "5.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.1\n\n**Second hazard class (table column):** 1.1, 1.2, 1.5\n\n**Row description:** Oxidizing substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 4\n\n**What the code requires:** 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "5.1", "class_b": "1.1, 1.2, 1.5", "code": "4", "file": "carriage-by-vessel-oxidizing-substances-1-1-1-2-1-5-5-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-oxidizing-substances-1-1-1-2-1-5-5-1", "mode": "Carriage by Vessel", "requirement": "4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d", "row_name": "Oxidizing substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "5.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.1\n\n**Second hazard class (table column):** 1.3\n\n**Row description:** Oxidizing substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 4\n\n**What the code requires:** 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "5.1", "class_b": "1.3", "code": "4", "file": "carriage-by-vessel-oxidizing-substances-1-3-5-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-oxidizing-substances-1-3-5-1", "mode": "Carriage by Vessel", "requirement": "4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d", "row_name": "Oxidizing substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "5.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.1\n\n**Second hazard class (table column):** 1.4, 1.6\n\n**Row description:** Oxidizing substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "5.1", "class_b": "1.4, 1.6", "code": "2", "file": "carriage-by-vessel-oxidizing-substances-1-4-1-6-5-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-oxidizing-substances-1-4-1-6-5-1", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Oxidizing substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "5.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.1\n\n**Second hazard class (table column):** 2.1\n\n**Row description:** Oxidizing substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "5.1", "class_b": "2.1", "code": "2", "file": "carriage-by-vessel-oxidizing-substances-2-1-5-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-oxidizing-substances-2-1-5-1", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Oxidizing substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "5.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.1\n\n**Second hazard class (table column):** 2.2\n\n**Row description:** Oxidizing substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "5.1", "class_b": "2.2", "code": "X", "file": "carriage-by-vessel-oxidizing-substances-2-2-5-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-oxidizing-substances-2-2-5-1", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Oxidizing substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "5.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.1\n\n**Second hazard class (table column):** 2.3\n\n**Row description:** Oxidizing substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "5.1", "class_b": "2.3", "code": "X", "file": "carriage-by-vessel-oxidizing-substances-2-3-5-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-oxidizing-substances-2-3-5-1", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Oxidizing substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "5.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.1\n\n**Second hazard class (table column):** 3\n\n**Row description:** Oxidizing substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "5.1", "class_b": "3", "code": "2", "file": "carriage-by-vessel-oxidizing-substances-3-5-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-oxidizing-substances-3-5-1", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Oxidizing substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "5.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.1\n\n**Second hazard class (table column):** 4.1\n\n**Row description:** Oxidizing substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "5.1", "class_b": "4.1", "code": "1", "file": "carriage-by-vessel-oxidizing-substances-4-1-5-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-oxidizing-substances-4-1-5-1", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Oxidizing substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "5.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.1\n\n**Second hazard class (table column):** 4.2\n\n**Row description:** Oxidizing substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "5.1", "class_b": "4.2", "code": "2", "file": "carriage-by-vessel-oxidizing-substances-4-2-5-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-oxidizing-substances-4-2-5-1", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Oxidizing substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "5.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.1\n\n**Second hazard class (table column):** 4.3\n\n**Row description:** Oxidizing substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "5.1", "class_b": "4.3", "code": "2", "file": "carriage-by-vessel-oxidizing-substances-4-3-5-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-oxidizing-substances-4-3-5-1", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Oxidizing substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "5.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.1\n\n**Second hazard class (table column):** 5.1\n\n**Row description:** Oxidizing substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "5.1", "class_b": "5.1", "code": "X", "file": "carriage-by-vessel-oxidizing-substances-5-1-5-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-oxidizing-substances-5-1-5-1", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Oxidizing substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "5.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.1\n\n**Second hazard class (table column):** 5.2\n\n**Row description:** Oxidizing substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "5.1", "class_b": "5.2", "code": "2", "file": "carriage-by-vessel-oxidizing-substances-5-2-5-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-oxidizing-substances-5-2-5-1", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Oxidizing substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "5.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.1\n\n**Second hazard class (table column):** 6.1\n\n**Row description:** Oxidizing substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "5.1", "class_b": "6.1", "code": "1", "file": "carriage-by-vessel-oxidizing-substances-6-1-5-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-oxidizing-substances-6-1-5-1", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Oxidizing substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "5.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.1\n\n**Second hazard class (table column):** 6.2\n\n**Row description:** Oxidizing substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 3\n\n**What the code requires:** 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "5.1", "class_b": "6.2", "code": "3", "file": "carriage-by-vessel-oxidizing-substances-6-2-5-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-oxidizing-substances-6-2-5-1", "mode": "Carriage by Vessel", "requirement": "3\u2014\u201cSeparated by a complete compartment or hold from.\u201d", "row_name": "Oxidizing substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "5.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.1\n\n**Second hazard class (table column):** 7\n\n**Row description:** Oxidizing substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "5.1", "class_b": "7", "code": "1", "file": "carriage-by-vessel-oxidizing-substances-7-5-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-oxidizing-substances-7-5-1", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Oxidizing substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "5.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.1\n\n**Second hazard class (table column):** 8\n\n**Row description:** Oxidizing substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "5.1", "class_b": "8", "code": "2", "file": "carriage-by-vessel-oxidizing-substances-8-5-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-oxidizing-substances-8-5-1", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Oxidizing substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "5.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 5.1\n\n**Second hazard class (table column):** 9\n\n**Row description:** Oxidizing substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "5.1", "class_b": "9", "code": "X", "file": "carriage-by-vessel-oxidizing-substances-9-5-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-oxidizing-substances-9-5-1", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Oxidizing substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "5.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 1.1, 1.2, 1.5\n\n**Row description:** Poisonous gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.3", "class_b": "1.1, 1.2, 1.5", "code": "2", "file": "carriage-by-vessel-poisonous-gases-1-1-1-2-1-5-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-poisonous-gases-1-1-1-2-1-5-2-3", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Poisonous gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 1.3\n\n**Row description:** Poisonous gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.3", "class_b": "1.3", "code": "2", "file": "carriage-by-vessel-poisonous-gases-1-3-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-poisonous-gases-1-3-2-3", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Poisonous gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 1.4, 1.6\n\n**Row description:** Poisonous gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.3", "class_b": "1.4, 1.6", "code": "1", "file": "carriage-by-vessel-poisonous-gases-1-4-1-6-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-poisonous-gases-1-4-1-6-2-3", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Poisonous gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 2.1\n\n**Row description:** Poisonous gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.3", "class_b": "2.1", "code": "X", "file": "carriage-by-vessel-poisonous-gases-2-1-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-poisonous-gases-2-1-2-3", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Poisonous gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 2.2\n\n**Row description:** Poisonous gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.3", "class_b": "2.2", "code": "X", "file": "carriage-by-vessel-poisonous-gases-2-2-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-poisonous-gases-2-2-2-3", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Poisonous gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 2.3\n\n**Row description:** Poisonous gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.3", "class_b": "2.3", "code": "X", "file": "carriage-by-vessel-poisonous-gases-2-3-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-poisonous-gases-2-3-2-3", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Poisonous gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 3\n\n**Row description:** Poisonous gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.3", "class_b": "3", "code": "2", "file": "carriage-by-vessel-poisonous-gases-3-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-poisonous-gases-3-2-3", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Poisonous gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 4.1\n\n**Row description:** Poisonous gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.3", "class_b": "4.1", "code": "X", "file": "carriage-by-vessel-poisonous-gases-4-1-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-poisonous-gases-4-1-2-3", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Poisonous gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 4.2\n\n**Row description:** Poisonous gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.3", "class_b": "4.2", "code": "2", "file": "carriage-by-vessel-poisonous-gases-4-2-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-poisonous-gases-4-2-2-3", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Poisonous gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 4.3\n\n**Row description:** Poisonous gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.3", "class_b": "4.3", "code": "X", "file": "carriage-by-vessel-poisonous-gases-4-3-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-poisonous-gases-4-3-2-3", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Poisonous gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 5.1\n\n**Row description:** Poisonous gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.3", "class_b": "5.1", "code": "X", "file": "carriage-by-vessel-poisonous-gases-5-1-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-poisonous-gases-5-1-2-3", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Poisonous gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 5.2\n\n**Row description:** Poisonous gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.3", "class_b": "5.2", "code": "2", "file": "carriage-by-vessel-poisonous-gases-5-2-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-poisonous-gases-5-2-2-3", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Poisonous gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 6.1\n\n**Row description:** Poisonous gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.3", "class_b": "6.1", "code": "X", "file": "carriage-by-vessel-poisonous-gases-6-1-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-poisonous-gases-6-1-2-3", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Poisonous gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 6.2\n\n**Row description:** Poisonous gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.3", "class_b": "6.2", "code": "2", "file": "carriage-by-vessel-poisonous-gases-6-2-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-poisonous-gases-6-2-2-3", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Poisonous gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 7\n\n**Row description:** Poisonous gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.3", "class_b": "7", "code": "1", "file": "carriage-by-vessel-poisonous-gases-7-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-poisonous-gases-7-2-3", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Poisonous gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 8\n\n**Row description:** Poisonous gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.3", "class_b": "8", "code": "X", "file": "carriage-by-vessel-poisonous-gases-8-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-poisonous-gases-8-2-3", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Poisonous gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 2.3\n\n**Second hazard class (table column):** 9\n\n**Row description:** Poisonous gases\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "2.3", "class_b": "9", "code": "X", "file": "carriage-by-vessel-poisonous-gases-9-2-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-poisonous-gases-9-2-3", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Poisonous gases", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "2.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.1\n\n**Second hazard class (table column):** 1.1, 1.2, 1.5\n\n**Row description:** Poisons\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "6.1", "class_b": "1.1, 1.2, 1.5", "code": "2", "file": "carriage-by-vessel-poisons-1-1-1-2-1-5-6-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-poisons-1-1-1-2-1-5-6-1", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Poisons", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "6.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.1\n\n**Second hazard class (table column):** 1.3\n\n**Row description:** Poisons\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "6.1", "class_b": "1.3", "code": "2", "file": "carriage-by-vessel-poisons-1-3-6-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-poisons-1-3-6-1", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Poisons", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "6.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.1\n\n**Second hazard class (table column):** 1.4, 1.6\n\n**Row description:** Poisons\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "6.1", "class_b": "1.4, 1.6", "code": "X", "file": "carriage-by-vessel-poisons-1-4-1-6-6-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-poisons-1-4-1-6-6-1", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Poisons", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "6.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.1\n\n**Second hazard class (table column):** 2.1\n\n**Row description:** Poisons\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "6.1", "class_b": "2.1", "code": "X", "file": "carriage-by-vessel-poisons-2-1-6-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-poisons-2-1-6-1", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Poisons", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "6.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.1\n\n**Second hazard class (table column):** 2.2\n\n**Row description:** Poisons\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "6.1", "class_b": "2.2", "code": "X", "file": "carriage-by-vessel-poisons-2-2-6-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-poisons-2-2-6-1", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Poisons", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "6.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.1\n\n**Second hazard class (table column):** 2.3\n\n**Row description:** Poisons\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "6.1", "class_b": "2.3", "code": "X", "file": "carriage-by-vessel-poisons-2-3-6-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-poisons-2-3-6-1", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Poisons", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "6.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.1\n\n**Second hazard class (table column):** 3\n\n**Row description:** Poisons\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "6.1", "class_b": "3", "code": "X", "file": "carriage-by-vessel-poisons-3-6-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-poisons-3-6-1", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Poisons", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "6.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.1\n\n**Second hazard class (table column):** 4.1\n\n**Row description:** Poisons\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "6.1", "class_b": "4.1", "code": "X", "file": "carriage-by-vessel-poisons-4-1-6-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-poisons-4-1-6-1", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Poisons", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "6.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.1\n\n**Second hazard class (table column):** 4.2\n\n**Row description:** Poisons\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "6.1", "class_b": "4.2", "code": "1", "file": "carriage-by-vessel-poisons-4-2-6-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-poisons-4-2-6-1", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Poisons", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "6.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.1\n\n**Second hazard class (table column):** 4.3\n\n**Row description:** Poisons\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "6.1", "class_b": "4.3", "code": "X", "file": "carriage-by-vessel-poisons-4-3-6-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-poisons-4-3-6-1", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Poisons", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "6.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.1\n\n**Second hazard class (table column):** 5.1\n\n**Row description:** Poisons\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "6.1", "class_b": "5.1", "code": "1", "file": "carriage-by-vessel-poisons-5-1-6-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-poisons-5-1-6-1", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Poisons", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "6.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.1\n\n**Second hazard class (table column):** 5.2\n\n**Row description:** Poisons\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "6.1", "class_b": "5.2", "code": "1", "file": "carriage-by-vessel-poisons-5-2-6-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-poisons-5-2-6-1", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Poisons", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "6.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.1\n\n**Second hazard class (table column):** 6.1\n\n**Row description:** Poisons\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "6.1", "class_b": "6.1", "code": "X", "file": "carriage-by-vessel-poisons-6-1-6-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-poisons-6-1-6-1", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Poisons", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "6.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.1\n\n**Second hazard class (table column):** 6.2\n\n**Row description:** Poisons\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "6.1", "class_b": "6.2", "code": "1", "file": "carriage-by-vessel-poisons-6-2-6-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-poisons-6-2-6-1", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Poisons", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "6.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.1\n\n**Second hazard class (table column):** 7\n\n**Row description:** Poisons\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "6.1", "class_b": "7", "code": "X", "file": "carriage-by-vessel-poisons-7-6-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-poisons-7-6-1", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Poisons", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "6.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.1\n\n**Second hazard class (table column):** 8\n\n**Row description:** Poisons\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "6.1", "class_b": "8", "code": "X", "file": "carriage-by-vessel-poisons-8-6-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-poisons-8-6-1", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Poisons", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "6.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 6.1\n\n**Second hazard class (table column):** 9\n\n**Row description:** Poisons\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "6.1", "class_b": "9", "code": "X", "file": "carriage-by-vessel-poisons-9-6-1.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-poisons-9-6-1", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Poisons", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "6.1 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 7\n\n**Second hazard class (table column):** 1.1, 1.2, 1.5\n\n**Row description:** Radioactive materials\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "7", "class_b": "1.1, 1.2, 1.5", "code": "2", "file": "carriage-by-vessel-radioactive-materials-1-1-1-2-1-5-7.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-radioactive-materials-1-1-1-2-1-5-7", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Radioactive materials", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "7 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 7\n\n**Second hazard class (table column):** 1.3\n\n**Row description:** Radioactive materials\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "7", "class_b": "1.3", "code": "2", "file": "carriage-by-vessel-radioactive-materials-1-3-7.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-radioactive-materials-1-3-7", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Radioactive materials", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "7 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 7\n\n**Second hazard class (table column):** 1.4, 1.6\n\n**Row description:** Radioactive materials\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "7", "class_b": "1.4, 1.6", "code": "2", "file": "carriage-by-vessel-radioactive-materials-1-4-1-6-7.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-radioactive-materials-1-4-1-6-7", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Radioactive materials", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "7 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 7\n\n**Second hazard class (table column):** 2.1\n\n**Row description:** Radioactive materials\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "7", "class_b": "2.1", "code": "2", "file": "carriage-by-vessel-radioactive-materials-2-1-7.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-radioactive-materials-2-1-7", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Radioactive materials", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "7 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 7\n\n**Second hazard class (table column):** 2.2\n\n**Row description:** Radioactive materials\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "7", "class_b": "2.2", "code": "1", "file": "carriage-by-vessel-radioactive-materials-2-2-7.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-radioactive-materials-2-2-7", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Radioactive materials", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "7 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 7\n\n**Second hazard class (table column):** 2.3\n\n**Row description:** Radioactive materials\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "7", "class_b": "2.3", "code": "1", "file": "carriage-by-vessel-radioactive-materials-2-3-7.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-radioactive-materials-2-3-7", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Radioactive materials", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "7 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 7\n\n**Second hazard class (table column):** 3\n\n**Row description:** Radioactive materials\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "7", "class_b": "3", "code": "2", "file": "carriage-by-vessel-radioactive-materials-3-7.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-radioactive-materials-3-7", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Radioactive materials", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "7 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 7\n\n**Second hazard class (table column):** 4.1\n\n**Row description:** Radioactive materials\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "7", "class_b": "4.1", "code": "2", "file": "carriage-by-vessel-radioactive-materials-4-1-7.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-radioactive-materials-4-1-7", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Radioactive materials", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "7 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 7\n\n**Second hazard class (table column):** 4.2\n\n**Row description:** Radioactive materials\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "7", "class_b": "4.2", "code": "2", "file": "carriage-by-vessel-radioactive-materials-4-2-7.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-radioactive-materials-4-2-7", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Radioactive materials", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "7 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 7\n\n**Second hazard class (table column):** 4.3\n\n**Row description:** Radioactive materials\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "7", "class_b": "4.3", "code": "2", "file": "carriage-by-vessel-radioactive-materials-4-3-7.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-radioactive-materials-4-3-7", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Radioactive materials", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "7 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 7\n\n**Second hazard class (table column):** 5.1\n\n**Row description:** Radioactive materials\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "7", "class_b": "5.1", "code": "1", "file": "carriage-by-vessel-radioactive-materials-5-1-7.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-radioactive-materials-5-1-7", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Radioactive materials", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "7 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 7\n\n**Second hazard class (table column):** 5.2\n\n**Row description:** Radioactive materials\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "7", "class_b": "5.2", "code": "2", "file": "carriage-by-vessel-radioactive-materials-5-2-7.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-radioactive-materials-5-2-7", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Radioactive materials", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "7 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 7\n\n**Second hazard class (table column):** 6.1\n\n**Row description:** Radioactive materials\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "7", "class_b": "6.1", "code": "X", "file": "carriage-by-vessel-radioactive-materials-6-1-7.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-radioactive-materials-6-1-7", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Radioactive materials", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "7 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 7\n\n**Second hazard class (table column):** 6.2\n\n**Row description:** Radioactive materials\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 3\n\n**What the code requires:** 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "7", "class_b": "6.2", "code": "3", "file": "carriage-by-vessel-radioactive-materials-6-2-7.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-radioactive-materials-6-2-7", "mode": "Carriage by Vessel", "requirement": "3\u2014\u201cSeparated by a complete compartment or hold from.\u201d", "row_name": "Radioactive materials", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "7 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 7\n\n**Second hazard class (table column):** 7\n\n**Row description:** Radioactive materials\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "7", "class_b": "7", "code": "X", "file": "carriage-by-vessel-radioactive-materials-7-7.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-radioactive-materials-7-7", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Radioactive materials", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "7 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 7\n\n**Second hazard class (table column):** 8\n\n**Row description:** Radioactive materials\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "7", "class_b": "8", "code": "2", "file": "carriage-by-vessel-radioactive-materials-8-7.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-radioactive-materials-8-7", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Radioactive materials", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "7 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 7\n\n**Second hazard class (table column):** 9\n\n**Row description:** Radioactive materials\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "7", "class_b": "9", "code": "X", "file": "carriage-by-vessel-radioactive-materials-9-7.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-radioactive-materials-9-7", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Radioactive materials", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "7 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.2\n\n**Second hazard class (table column):** 1.1, 1.2, 1.5\n\n**Row description:** Spontaneously combustible substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 4\n\n**What the code requires:** 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.2", "class_b": "1.1, 1.2, 1.5", "code": "4", "file": "carriage-by-vessel-spontaneously-combustible-substances-1-1-1-2-1-5-4-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-spontaneously-combustible-substances-1-1-1-2-1-5-4-2", "mode": "Carriage by Vessel", "requirement": "4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d", "row_name": "Spontaneously combustible substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.2\n\n**Second hazard class (table column):** 1.3\n\n**Row description:** Spontaneously combustible substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 3\n\n**What the code requires:** 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.2", "class_b": "1.3", "code": "3", "file": "carriage-by-vessel-spontaneously-combustible-substances-1-3-4-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-spontaneously-combustible-substances-1-3-4-2", "mode": "Carriage by Vessel", "requirement": "3\u2014\u201cSeparated by a complete compartment or hold from.\u201d", "row_name": "Spontaneously combustible substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.2\n\n**Second hazard class (table column):** 1.4, 1.6\n\n**Row description:** Spontaneously combustible substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.2", "class_b": "1.4, 1.6", "code": "2", "file": "carriage-by-vessel-spontaneously-combustible-substances-1-4-1-6-4-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-spontaneously-combustible-substances-1-4-1-6-4-2", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Spontaneously combustible substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.2\n\n**Second hazard class (table column):** 2.1\n\n**Row description:** Spontaneously combustible substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.2", "class_b": "2.1", "code": "2", "file": "carriage-by-vessel-spontaneously-combustible-substances-2-1-4-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-spontaneously-combustible-substances-2-1-4-2", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Spontaneously combustible substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.2\n\n**Second hazard class (table column):** 2.2\n\n**Row description:** Spontaneously combustible substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.2", "class_b": "2.2", "code": "1", "file": "carriage-by-vessel-spontaneously-combustible-substances-2-2-4-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-spontaneously-combustible-substances-2-2-4-2", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Spontaneously combustible substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.2\n\n**Second hazard class (table column):** 2.3\n\n**Row description:** Spontaneously combustible substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.2", "class_b": "2.3", "code": "2", "file": "carriage-by-vessel-spontaneously-combustible-substances-2-3-4-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-spontaneously-combustible-substances-2-3-4-2", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Spontaneously combustible substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.2\n\n**Second hazard class (table column):** 3\n\n**Row description:** Spontaneously combustible substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.2", "class_b": "3", "code": "2", "file": "carriage-by-vessel-spontaneously-combustible-substances-3-4-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-spontaneously-combustible-substances-3-4-2", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Spontaneously combustible substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.2\n\n**Second hazard class (table column):** 4.1\n\n**Row description:** Spontaneously combustible substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.2", "class_b": "4.1", "code": "1", "file": "carriage-by-vessel-spontaneously-combustible-substances-4-1-4-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-spontaneously-combustible-substances-4-1-4-2", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Spontaneously combustible substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.2\n\n**Second hazard class (table column):** 4.2\n\n**Row description:** Spontaneously combustible substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.2", "class_b": "4.2", "code": "X", "file": "carriage-by-vessel-spontaneously-combustible-substances-4-2-4-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-spontaneously-combustible-substances-4-2-4-2", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Spontaneously combustible substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.2\n\n**Second hazard class (table column):** 4.3\n\n**Row description:** Spontaneously combustible substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.2", "class_b": "4.3", "code": "1", "file": "carriage-by-vessel-spontaneously-combustible-substances-4-3-4-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-spontaneously-combustible-substances-4-3-4-2", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Spontaneously combustible substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.2\n\n**Second hazard class (table column):** 5.1\n\n**Row description:** Spontaneously combustible substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.2", "class_b": "5.1", "code": "2", "file": "carriage-by-vessel-spontaneously-combustible-substances-5-1-4-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-spontaneously-combustible-substances-5-1-4-2", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Spontaneously combustible substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.2\n\n**Second hazard class (table column):** 5.2\n\n**Row description:** Spontaneously combustible substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.2", "class_b": "5.2", "code": "2", "file": "carriage-by-vessel-spontaneously-combustible-substances-5-2-4-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-spontaneously-combustible-substances-5-2-4-2", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Spontaneously combustible substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.2\n\n**Second hazard class (table column):** 6.1\n\n**Row description:** Spontaneously combustible substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.2", "class_b": "6.1", "code": "1", "file": "carriage-by-vessel-spontaneously-combustible-substances-6-1-4-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-spontaneously-combustible-substances-6-1-4-2", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Spontaneously combustible substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.2\n\n**Second hazard class (table column):** 6.2\n\n**Row description:** Spontaneously combustible substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 3\n\n**What the code requires:** 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.2", "class_b": "6.2", "code": "3", "file": "carriage-by-vessel-spontaneously-combustible-substances-6-2-4-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-spontaneously-combustible-substances-6-2-4-2", "mode": "Carriage by Vessel", "requirement": "3\u2014\u201cSeparated by a complete compartment or hold from.\u201d", "row_name": "Spontaneously combustible substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.2\n\n**Second hazard class (table column):** 7\n\n**Row description:** Spontaneously combustible substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.2", "class_b": "7", "code": "2", "file": "carriage-by-vessel-spontaneously-combustible-substances-7-4-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-spontaneously-combustible-substances-7-4-2", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Spontaneously combustible substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.2\n\n**Second hazard class (table column):** 8\n\n**Row description:** Spontaneously combustible substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.2", "class_b": "8", "code": "1", "file": "carriage-by-vessel-spontaneously-combustible-substances-8-4-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-spontaneously-combustible-substances-8-4-2", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Spontaneously combustible substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.2\n\n**Second hazard class (table column):** 9\n\n**Row description:** Spontaneously combustible substances\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.2", "class_b": "9", "code": "X", "file": "carriage-by-vessel-spontaneously-combustible-substances-9-4-2.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-spontaneously-combustible-substances-9-4-2", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Spontaneously combustible substances", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.2 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.3\n\n**Second hazard class (table column):** 1.1, 1.2, 1.5\n\n**Row description:** Substances which are dangerous when wet\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 4\n\n**What the code requires:** 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.3", "class_b": "1.1, 1.2, 1.5", "code": "4", "file": "carriage-by-vessel-substances-which-are-dangerous-when-wet-1-1-1-2-1-5-4-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-substances-which-are-dangerous-when-wet-1-1-1-2-1-5-4-3", "mode": "Carriage by Vessel", "requirement": "4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d", "row_name": "Substances which are dangerous when wet", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.3\n\n**Second hazard class (table column):** 1.3\n\n**Row description:** Substances which are dangerous when wet\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 4\n\n**What the code requires:** 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.3", "class_b": "1.3", "code": "4", "file": "carriage-by-vessel-substances-which-are-dangerous-when-wet-1-3-4-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-substances-which-are-dangerous-when-wet-1-3-4-3", "mode": "Carriage by Vessel", "requirement": "4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d", "row_name": "Substances which are dangerous when wet", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.3\n\n**Second hazard class (table column):** 1.4, 1.6\n\n**Row description:** Substances which are dangerous when wet\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.3", "class_b": "1.4, 1.6", "code": "2", "file": "carriage-by-vessel-substances-which-are-dangerous-when-wet-1-4-1-6-4-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-substances-which-are-dangerous-when-wet-1-4-1-6-4-3", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Substances which are dangerous when wet", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.3\n\n**Second hazard class (table column):** 2.1\n\n**Row description:** Substances which are dangerous when wet\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.3", "class_b": "2.1", "code": "2", "file": "carriage-by-vessel-substances-which-are-dangerous-when-wet-2-1-4-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-substances-which-are-dangerous-when-wet-2-1-4-3", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Substances which are dangerous when wet", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.3\n\n**Second hazard class (table column):** 2.2\n\n**Row description:** Substances which are dangerous when wet\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.3", "class_b": "2.2", "code": "X", "file": "carriage-by-vessel-substances-which-are-dangerous-when-wet-2-2-4-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-substances-which-are-dangerous-when-wet-2-2-4-3", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Substances which are dangerous when wet", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.3\n\n**Second hazard class (table column):** 2.3\n\n**Row description:** Substances which are dangerous when wet\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.3", "class_b": "2.3", "code": "X", "file": "carriage-by-vessel-substances-which-are-dangerous-when-wet-2-3-4-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-substances-which-are-dangerous-when-wet-2-3-4-3", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Substances which are dangerous when wet", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.3\n\n**Second hazard class (table column):** 3\n\n**Row description:** Substances which are dangerous when wet\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.3", "class_b": "3", "code": "2", "file": "carriage-by-vessel-substances-which-are-dangerous-when-wet-3-4-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-substances-which-are-dangerous-when-wet-3-4-3", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Substances which are dangerous when wet", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.3\n\n**Second hazard class (table column):** 4.1\n\n**Row description:** Substances which are dangerous when wet\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.3", "class_b": "4.1", "code": "X", "file": "carriage-by-vessel-substances-which-are-dangerous-when-wet-4-1-4-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-substances-which-are-dangerous-when-wet-4-1-4-3", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Substances which are dangerous when wet", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.3\n\n**Second hazard class (table column):** 4.2\n\n**Row description:** Substances which are dangerous when wet\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.3", "class_b": "4.2", "code": "1", "file": "carriage-by-vessel-substances-which-are-dangerous-when-wet-4-2-4-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-substances-which-are-dangerous-when-wet-4-2-4-3", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Substances which are dangerous when wet", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.3\n\n**Second hazard class (table column):** 4.3\n\n**Row description:** Substances which are dangerous when wet\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.3", "class_b": "4.3", "code": "X", "file": "carriage-by-vessel-substances-which-are-dangerous-when-wet-4-3-4-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-substances-which-are-dangerous-when-wet-4-3-4-3", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Substances which are dangerous when wet", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.3\n\n**Second hazard class (table column):** 5.1\n\n**Row description:** Substances which are dangerous when wet\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.3", "class_b": "5.1", "code": "2", "file": "carriage-by-vessel-substances-which-are-dangerous-when-wet-5-1-4-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-substances-which-are-dangerous-when-wet-5-1-4-3", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Substances which are dangerous when wet", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.3\n\n**Second hazard class (table column):** 5.2\n\n**Row description:** Substances which are dangerous when wet\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.3", "class_b": "5.2", "code": "2", "file": "carriage-by-vessel-substances-which-are-dangerous-when-wet-5-2-4-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-substances-which-are-dangerous-when-wet-5-2-4-3", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Substances which are dangerous when wet", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.3\n\n**Second hazard class (table column):** 6.1\n\n**Row description:** Substances which are dangerous when wet\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.3", "class_b": "6.1", "code": "X", "file": "carriage-by-vessel-substances-which-are-dangerous-when-wet-6-1-4-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-substances-which-are-dangerous-when-wet-6-1-4-3", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Substances which are dangerous when wet", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.3\n\n**Second hazard class (table column):** 6.2\n\n**Row description:** Substances which are dangerous when wet\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.3", "class_b": "6.2", "code": "2", "file": "carriage-by-vessel-substances-which-are-dangerous-when-wet-6-2-4-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-substances-which-are-dangerous-when-wet-6-2-4-3", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Substances which are dangerous when wet", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.3\n\n**Second hazard class (table column):** 7\n\n**Row description:** Substances which are dangerous when wet\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 2\n\n**What the code requires:** 2\u2014\u201cSeparated from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.3", "class_b": "7", "code": "2", "file": "carriage-by-vessel-substances-which-are-dangerous-when-wet-7-4-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-substances-which-are-dangerous-when-wet-7-4-3", "mode": "Carriage by Vessel", "requirement": "2\u2014\u201cSeparated from.\u201d", "row_name": "Substances which are dangerous when wet", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.3\n\n**Second hazard class (table column):** 8\n\n**Row description:** Substances which are dangerous when wet\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** 1\n\n**What the code requires:** 1\u2014\u201cAway from.\u201d\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.3", "class_b": "8", "code": "1", "file": "carriage-by-vessel-substances-which-are-dangerous-when-wet-8-4-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-substances-which-are-dangerous-when-wet-8-4-3", "mode": "Carriage by Vessel", "requirement": "1\u2014\u201cAway from.\u201d", "row_name": "Substances which are dangerous when wet", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true} {"asset": "hazmat-segregation-matrix", "body": "**First hazard class (table row):** 4.3\n\n**Second hazard class (table column):** 9\n\n**Row description:** Substances which are dangerous when wet\n\n**Transport mode:** Carriage by Vessel\n\n**Segregation code:** X\n\n**What the code requires:** X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.\n\n> General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |\n\nSource: \n", "class_a": "4.3", "class_b": "9", "code": "X", "file": "carriage-by-vessel-substances-which-are-dangerous-when-wet-9-4-3.md", "generated": true, "harvested": "2026-08-10", "id": "carriage-by-vessel-substances-which-are-dangerous-when-wet-9-4-3", "mode": "Carriage by Vessel", "requirement": "X\u2014The segregation, if any, is shown in the \u00a7 172.101 table.", "row_name": "Substances which are dangerous when wet", "source_quote": "General Segregation Requirements for Hazardous Materials [Segregation must also take account of a single secondary hazard label, as required by paragraph (a)(6) of this section.] Class | 1.1, 1.2, 1.5 | 1.3 | 1.4, 1.6 | 2.1 | 2.2 | 2.3 | 3 | 4.1 | 4.2 | 4.3 | 5.1 | 5.2 | 6.1 | 6.2 | 7 | 8 | 9 | Explosives, 1.1, 1.2, 1.5 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 2 | 4 | X | Explosives, 1.3 | (*) | (*) | (*) | 4 | 2 | 2 | 4 | 3 | 3 | 4 | 4 | 4 | 2 | 4 | 2 | 2 | X | Explosives, 1.4, 1.6 | (*) | (*) | (*) | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 4 | 2 | 2 | X | Flammable gases 2.1 | 4 | 4 | 2 | X | X | X | 2 | 1 | 2 | 2 | 2 | 2 | X | 4 | 2 | 1 | X | Non-toxic, non-flammable gases 2.2 | 2 | 2 | 1 | X | X | X | 1 | X | 1 | X | X | 1 | X | 2 | 1 | X | X | Poisonous gases 2.3 | 2 | 2 | 1 | X | X | X | 2 | X | 2 | X | X | 2 | X | 2 | 1 | X | X | Flammable liquids 3 | 4 | 4 | 2 | 2 | 1 | 2 | X | X | 2 | 2 | 2 | 2 | X | 3 | 2 | X | X | Flammable solids 4.1 | 4 | 3 | 2 | 1 | X | X | X | X | 1 | X | 1 | 2 | X | 3 | 2 | 1 | X | Spontaneously combustible substances 4.2 | 4 | 3 | 2 | 2 | 1 | 2 | 2 | 1 | X | 1 | 2 | 2 | 1 | 3 | 2 | 1 | X | Substances which are dangerous when wet 4.3 | 4 | 4 | 2 | 2 | X | X | 2 | X | 1 | X | 2 | 2 | X | 2 | 2 | 1 | X | Oxidizing substances 5.1 | 4 | 4 | 2 | 2 | X | X | 2 | 1 | 2 | 2 | X | 2 | 1 | 3 | 1 | 2 | X | Organic peroxides 5.2 | 4 | 4 | 2 | 2 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | X | 1 | 3 | 2 | 2 | X | Poisons 6.1 | 2 | 2 | X | X | X | X | X | X | 1 | X | 1 | 1 | X | 1 | X | X | X | Infectious substances 6.2 | 4 | 4 | 4 | 4 | 2 | 2 | 3 | 3 | 3 | 2 | 3 | 3 | 1 | X | 3 | 3 | X | Radioactive materials 7 | 2 | 2 | 2 | 2 | 1 | 1 | 2 | 2 | 2 | 2 | 1 | 2 | X | 3 | X | 2 | X | Corrosives 8 | 4 | 2 | 2 | 1 | X | X | X | 1 | 1 | 1 | 2 | 2 | X | 3 | 2 | X | X | Miscellaneous dangerous substances 9 | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | X | Numbers and symbols relate to the following terms as defined in this section: | 1\u2014\u201cAway from.\u201d | 2\u2014\u201cSeparated from.\u201d | 3\u2014\u201cSeparated by a complete compartment or hold from.\u201d | 4\u2014\u201cSeparated longitudinally by an intervening complete compartment or hold from.\u201d | X\u2014The segregation, if any, is shown in the \u00a7 172.101 table. | *\u2014See \u00a7 176.144 of this part for segregation within Class 1. |", "sources": ["https://www.ecfr.gov/current/title-49/subtitle-B/chapter-I/subchapter-C/part-176/subpart-D/section-176.83"], "stale_after": "2027-08-10", "title": "4.3 \u2014 Hazmat load segregation \u2014 which hazard classes may travel together, highway vs vessel", "type": "compatibility-matrix", "verified": true}